SCIENCE BRINGS NATIONS TOGETHER JINR Association of Young Scientists and Specialists Conference "Alushta-2022"

5 Jun 2022, 09:00 → 12 Jun 2022, 14:40 Europe/Moscow

Association of Young Scientists and Specialists (AYSS) of the Joint Institute for Nuclear Research is holding the annual scientific conference of young scientists and specialists "Alushta-XI" on 5-12 June, 2022.

Within the event, the staff of the Institute will give their lectures on the recent achievements obtained by JINR laboratories. In its turn, young scientists and specialists  from JINR will present reports on their scientific research. In addition, it is planned to hold discussions on the topic of lectures, as well as a round table with JINR directorate and the city administration, where young scientists and specialists will be able to ask their questions and make their suggestions regarding the development of infrastructure, the organization of the scientific process, social policy and many other issues related to the institute and the city.

The working language of the conference is English.

Students, postgraduates, young scientists and specialists under 35 years old are invited to participate in the conference with oral presentations. Participants will be selected by the program committee on the basis of the submitted applications.

The list of supported participants will be available on the event's website. Applications must be submitted by 17 April 2022 (at 23:59) through the link.

If you have any questions, please contact: omusalushta@jinr.ru.

Information about transfer will be posted later.

Sunday 5 June

14:00 Lunch

15:00 Free time

17:00 Registration

18:00 Dinner

19:00 Registration

Opening ceremony

Alushta_opening_Rozhkov_2022.pdf

20:00 Welcome party

Monday 6 June

08:30 Breakfast

Plenary talks

1 Nucleon spin structure with NICA SPD

Speaker: Alexey Guskov (JINR)

SPD_2022_ALUSHTA.pdf

2 DNA damage: induction, repair and consequences

Speaker: Vladimir Chausov (LRB JINR)

11:30 Coffee

3 Photo

Sectional talks

4 Dilution cryostats for experiments with the Frozen Spin polarized Target at particle accelerators.

Nuclear-spin polarized targets play a key role in experimental nuclear and particle physics. They are essential for understanding how the proton and neutron get their spins from their constituent quarks and gluons and for measuring the electromagnetic structure of these nucleons. The principle of operation of the Frozen Spin polarized Target is based on a long nuclear spin relaxation time at low temperatures (less than 50 mK) and moderate magnetic fields (more than 0.3 T). After a polarization build-up with the Dynamic Nuclear Polarization process, microwave power is turned off and polarization is “frozen in” at a temperature of less than 50 mK and a magnetic field of about 0.3 T, so the spin relaxation time can be many hundreds of hours. To achieve such low temperatures dilution cryostats are used. This report will describe the design, construction and recent results of the horizontal cryostat for the new Bonn Frozen Spin Target, which is being developed for spin physics experiments with tagged photons from the Bonn electron accelerator “ELSA”.

Speaker: Mr Ivan Gorodnov (JINR, Russian Federation)

Gorodnov Ivan - Alushta 2022 report.pptx

5 A new software framework for the Baikal-GVD neutrino telescope

Baikal-GVD is a deep water neutrino telescope deployed in Lake Baikal with the main goal to establish the origin of the high and ultra-high energy neutrino. It detects neutrino interactions via Cherenkov light produced by their secondaries. Statistical analysis of the detector signal requires detailed simulation of the neutrino propagation through the Earth, their interaction in water, propagation of secondaries and background particles, Cherenkov light generation and transport and, finally, the response of the detector. Tracking particles from PeV energies down to Cherenkov light threshold and ray-tracing enormous number of photons poses a challenge and requires to search for novel modeling approaches. A new software framework, unifying a number of packages for different stages of simulation is designed and is being developed. The talk will cover the general concepts of the framework, novel approaches and some functionalities.

Speaker: Yury Malyshkin (JINR)

yum_BaikalGVD_simulation.pdf

6 Detection of charm particles in NA65/DsTau experiment at CERN-SPS

For clarifying the validity of the Lepton Universality hypothesis, the interaction cross section for all three flavors of leptons have to be known with high precision. In neutrino sector, for electron and muon neutrinos, the interaction cross section is known fairly well, but for tau neutrino only poor estimations exist. In particular, the most direct measurement by the DONuT experiment was performed with rather poor accuracy due to low statistics and an uncertainty of the tau neutrino flux. The DsTau experiment proposes to study tau-neutrino production process and thus to improve significantly the accuracy of calculations of tau neutrino flux for neutrino accelerator experiments. To study reactions providing most of tau neutrinos, the experiment uses a setup based on high resolution nuclear emulsions, capable to register short lived particle decays created in proton-nucleus interactions. In the present report the efficiency of detecting short lived particles, especially Ds decaying via tau and its charm partners (short lived particles), is presented.

Speaker: Madalina Mihaela Miloi (Joint Institute for Nuclear Research , University of Bucharest-Faculty of Physics)

Miloi_Alushta_2022.pdf

7 JINR's own medical cyclotron for proton therapy - MSC230. Novel design and other updates.

Our department is developing design of MSC230. The machine is a new generation medical cyclotron accelerating protons to 230 MeV energy. This talk is purposed to give the quick overview of the project, it current status, recent updates and changes. Some peculiarities of design using COMSOL, CST and MATLAB are also included.

Speaker: Dmitry Popov (JINR)

Alushta2022_UPLOAD2.pdf

8 Multimodal microSPECT/CT tomograph for preclinical studies

The report presents developments in the creation of microtomography systems for preclinical studies on laboratory animals. The results of SPECT and CT scanning on phantoms are presented, as well as the results of combining these modalities.

Speaker: Vladislav Rozhkov (JINR)

Multimodal microSPECT_CT tomograph for preclinical studies.pdf

9 Neutrino signals of the next galactic supernova

During the final stages of stellar evolution prior to the visible event of the supernova explosion, neutrino signals are produced at the core of the collapsing star. The time and energy profiles of these signals carry the information about the complex physical processes inside the star, as well as the fundamental properties of neutrino mixing. Also, if detected and analyzed with minimal latency, these signals can be used as an early warning for the following supernova explosion. The SuperNova Early Warning System (SNEWSv2.0) collaboration, uniting people from various neutrino and dark matter experiments, is developing infrastructure for an automated low-latency joint analysis of the next galactic supernova neutrino observations. This talk will describe the current status of the SNEWSv2.0 development, its goals and features.

Speaker: Andrey Sheshukov (JINR)

Neutrino_signals_from_the_next_galactic_SN.pdf

10 The Control System of the Linac-200 Electron Accelerator at JINR

The linear accelerator Linac-200 at JINR is constructed to provide lectron test beams with energy up to 200 MeV to carry out particle detector R&D, to perform studies of advanced methods of beam diagnostics, and to work as an irradiation facility for applied research. While the accelerator largely reuses refurbished parts of the MEA accelerator from NIKHEF, the accelerator control system is completely redesigned. A new distributed control system has been developed using the Tango toolkit. The key subsystems of the accelerator (including focusing and steering magnets control, vacuum control system, synchronization system, electron gun control system, precise temperature regulation system) were redesigned or deeply modernized. This report presents the design and the current status of the control system of the Linac-200 machine.

Speaker: Aleksei Trifonov (JINR)

Trifonov_06_06_2022.pdf

11 First detection of solar neutrinos from the CNO cycle of thermonuclear reactions

Energy production in stars occurs in chains of thermonuclear reactions and is accompanied by emission of neutrinos which provide important information on the stellar interior. CNO cycle of thermonuclear reactions is believed to be the primary energy production mechanism in stars heavier than the Sun. In spite of playing a subdominant role in the Sun itself, it can still be observed through the detection of neutrinos produced in the CNO reactions. Additionaly, measurement of the CNO neutrino flux provides direct information on the solar metallicity - the abundance of heavy elements in the Sun. The first detection of CNO neutrinos has been recently performed by the Borexino collaboration. In this talk we report details of the dedicated data analysis.

Speaker: Alina Vishneva (Dzhelepov Laboratory of Nuclear Problems, JINR, Dubna, 141980, Russia)

CNO_Alushta.pdf

12 The repair inhibitors effect on DNA damage in mice after exposure to 60Co γ-rays

Research devoted to the study of modifying agents that increase the yield of DNA damage in the cells of the central nervous system appear to be promising. We have previously shown that under the influence of inhibitors of DNA repair - 1-β-D-arabinofuranosyl cytosine (AraC) and hydroxyurea (HU), the yield of DNA double-strand breaks (DSB) increases upon γ-irradiation of cells of various types in vitro. The mechanism of this process is based on the transformation of long-term non-repairable single-strand breaks (SSB) of DNA into enzymatic DSB. In this case, the magnitude of the modifying effect of these agents depends on the quality of the radiation. In this work, we performed a comparative analysis of the induction and repair of DNA SSB and DSB in neuronal cells of mice (hippocampus and cerebellum) under γ-irradiation after intraperitoneal administration of AraC and AraC/HU combination in vivo. DNA comet assay method was used to study the regularities in the formation of DNA damage in cells from hippocampus and cerebellum of mice after exposure to γ-rays in vivo. It was found that for all types of cells used, there is a linear character in the yield of DNA lesions. It has been shown that the amount of DNA SSBs and DSBs formed during irradiation under the influence of AraC significantly increases. An additional increase in the yield of DNA SSBs and DSBs is observed under the combined action of AraC and HU. In addition, the repair kinetics of DNA damage under the influence of DNA repair inhibitors was studied. It has been shown that the kinetics of DNA SSB and DSB repair both in hippocampal and cerebellar cells is complex. Under the conditions of the influence of AraC alone and the combined influence of AraC/HU, an increase in the total amount of damage is observed during the entire post-irradiation period observed in the experiment.

Speaker: Ms Regina Kozhina (LRB)

13 Induction and repair of DNA double strand breaks in melanoma B16 cells in the presence of repair inhibitors under the action of X-rays in vitro

The search for new approaches aimed to change the radiosensitivity of cells is one of the priority tasks of radiobiology. Promising studies are of agents’ modifying effect that affect the DNA repair associated both with the transformation of long-term unrepaired DNA single-strand breaks into enzymatic double-strand breaks (DSB) - 1-β-D-arabinofuranosylcytosine (AraC), and inhibition of enzymes involved in non-homologous end joining - SCR7 pyrazine (SCR7). This is a new approach based on the mechanisms that lead to the formation of additional lethal DNA damage and can also lead to increase the effectiveness of ionizing radiation. DNA comet assay method was used for comparative analysis of the induction and repair of DNA DSB in melanoma B16 cells under the action of X-rays under the influence of repair inhibitors AraC and SCR7. The dose rate was about 1.6 Gy/min. With the help of this method, the dose dependences of DNA DSB formation were obtained. It was found that under the combined action of AraC/SCR7, the maximum amount of DNA DSBs is formed, exceeding the amount of DNA DSBs in the control level by 1.6 times, and 1.15 times under the influence of AraC. The repair kinetics of DNA DSB was studied under the influence of radio modifiers up to 24 hours of post-radiation incubation. It was shown that the repair kinetics is complex. In contrast with the control, the DNA DSB yield increases up to 6 hours post-irradiation, and then decreases. Moreover, under the influence of the combined action of radiomodifiers the number of unrepaired lesions exceeds the control level by 10.3 times and by 1.76 times under the action of AraC alone.

Speaker: Евгения Кузьмина (ОИЯИ)

Alushta_2022.pptx

14 Effect of repair inhibitors on the formation DNA double-strand breaks under the action of ionizing radiation with different physical characteristics.

Nucleoside analogues are a class of chemotherapeutic drugs that are used to increase tumor sensitivity to ionizing radiation (IR). In this work, we study the effect of the arabinoside-cytosine inhibitor AraC on the induction and elimination of DNA double-strand breaks (DSB) under the action of IR with different physical characteristics. Normal human fibroblasts and human tumor cells (glioblastoma U87) were irradiated with accelerated 15N ions (LET = 181 keV/µm) and extended Bragg’s peak protons (LET = 2 – 100 keV/µm) at a dose of 1.25 Gy under the action of the repair inhibitor AraC. Radiation-induced colocalized yH2AX/53BP1 foci of proteins involved in DNA DSB repair were visualized by immunocytochemical staining. A quantitative analysis of the obtained images showed that the most pronounced effect of AraC exposure is observed in both types of cell cultures under proton irradiation at the Bragg’s peak. The output of damage in fibroblasts increases 5 times compared to the control level, and in glioblastoma cells, the increase occurs more than 2 times. A decrease in the efficiency of DNA DSB repair under the action of accelerated 15N ions in the presence of the inhibitor was found in U87 glioblastoma cells.

Speaker: Daria Shamina (Dmitrievna)

15 Effect of the combined use of proton radiation and AraC on morphological changes and apoptosis in the liver of rats

The idea of using cytostatic drugs to increase the effectiveness of radiation therapy is of great interest to radiobiologists. In our experiments, 12 out of a total of 16, male, Sprague Dawley rats received a 3Gy dose of protons with 170 MeV energy in the cranio-caudal direction. The AraC dose of 0.4 g/m2 was administrated into the tail vein. The organs belonging to 4, 6 and respectively 4 animals were harvested at 4, 24 and 48 hours after irradiation and fixed in paraffin. The paraffin embedded tissue samples were sectioned to 8μm with a Thermo Fisher Scientific HM 340E microtome. The slides were stained using the H&E method and the morphological changes were studied by a LUMO Mikmed2 microscope. A qualitative analysis of the liver parenchyma of irradiated rats showed a significant dilatation of the liver sinusoids in periportal regions in the 4 hours-3Gy group. We are currently performing a statistical analysis on the morphological changes that occurred in the hepatic cells and our preliminary findings for the 4 hours groups illustrate a statistical signification between the number of binuclear hepatocytes, 4,79±0,35 for 3Gy group and 3,41 ±0,42 for 3Gy+AraC group, as a result of Mann-Whitney test. A quantitative, comparative analysis and a TUNEL assay are ongoing. We expect to find differences (pyknosis, karyolysis, karyorrhexis) due to the long-term effect of irradiation.

Speaker: Юрий Северюхин (JINR LRB)

Severiukhin_Alushta2022.pptx

14:00 Lunch

15:00 Free time

18:00 Dinner

Plenary talks

16 NICA: Предки, Рождение, Приключения и Будущее

Speaker: Anatoly Sidorin (VBLHEP JINR)

Tuesday 7 June

08:30 Breakfast

Plenary talks

17 Neutron Physics at JINR

Speaker: Valery Shvetsov (FLNP JINR)

18 Radiobiology and Information

Speaker: Alexei Chizhov (JINR)

11:30 Coffee break

Doodle Poll for the BEST TALK:
https://doodle.com/poll/ztt9d6pehq4tuccp

Sectional talks

19 Investigation for spectral biomarkers: chemical, UV and light induced NETosis.

Neutrophil extracellular traps (NETs) are produced by neutrophilic granulocytes and consist of decondensed chromatin decorated with antimicrobial peptides. They defend the organism against intruders and are released upon various stimuli, including ultraviolet (UV) radiation. It’s well known that extended exposure of the skin to UV leads to its damage and loss of protective properties. Many cells of the immune system, including neutrophils, are involved in the photoaging process [1]. In continuation of the initiated study on the activation of neutrophils by two approaches: biological (bacterial) and chemical (PMA) stimuli, we came over to examine the ability of neutrophils to realize NETs under the UVA (315-400 nm) irradiation. Human neutrophils were isolated from the whole blood obtained from healthy voluntary donor. Neutrophils unexposed to UV radiation were used as a negative control, while the positive control was represented by cells unexposed to UV radiation but stimulated with PMA (50 nM). We applied sensitive Raman spectroscopy and succeeded to register citrulline Raman band evaluation during the first hour of neutrophil cells activation [2]. In the novel set of the experiments we applied UVA radiation in a dose-depended manner. Proceed to the first series of NETosis experiment on UV, we took under advisement the fact that there is a contradictory proposition in the literature on signaling pathways leading to NETosis, which suggest either NOX-independent or NOX-dependent pathway. In the case of NOX-independent signaling pathway often has to realize peptidylarginine deiminase 4 (PAD4), which citrullinates histones contributing to chromatin decondensation. Also, in accordance with literature, neutrophil cells were treated with the calcium ionophore A23187 (A23) to activate NOX-independent NETosis resulting in the citrullination of histones. Data analysis was done implementing immunofluorescence microscopy and Raman spectroscopy. It was revealed that UV-induced activation undoubtedly leads to the formation of NETotic cells in the form of cloud-like-spread in the observed immunofluorescence imaging. Nevertheless, in contrast to NETosis activation with the calcium ionophore A23, the citrulline peak in Raman spectra has not observed. It is an evidence of the NOX-depended signaling pathway under the UV radiation applied. This research is in progress, including study of lowfrequency range of Raman spectra of DNA for the NETotic cells.

Speaker: Mr Yersultan Arynbek (JINR, INP, KAZNU)

Yersultan_Arynbek(Alushta_2022_AYSS).pdf

20 TalysLib – an easy way to get nuclear data

Information about various properties of atomic nuclei, as well as nuclear reaction data is often needed in experimental data processing programs. Access to the necessary information could be quite complex because of old-fashion punched card -like format which is used in nuclear structure or nuclear reaction databases. Sometimes there are no experimental information about particular reaction channels so theoretical estimations are needed. The TALYS[1] program for theoretical calculations of nuclear reaction characteristics is a great source of nuclear data. It contains nuclear structure database and library of the nuclear reaction models parameters adjusted to achieve good agreement between calculation and experiment[2]. To simplify access to the calculation results and the TALYS nuclear structure database, we are developing TalysLib. TalysLib is a ROOT[3]-based C++ object-oriented library. It can be used for: 1) extraction and visualization of the calculation results, 2) optimization of the nuclear models parameters using MINUIT package, 3) obtaining of the nuclear structure information from the TALYS database, 4) reading of the pre-processed EXFOR[4] and ENDF[5] files (work in process now) 1. A. J. Koning, S. Hilaire, M. C. Duijvestijn «TALYS-1.0», Proceedings of the International Conference on Nuclear Data for Science and Technology. EDP Sciences, 211(2007). 2. R. Capote, M. Herman, P. Oblozinsky et al. Nuclear Data Sheets. 110, 3107(2009). 3. R. Brun, F. Rademakers. Nucl. Inst. & Meth. in Phys. Res. A 389 (1997) 81-86. 4. A. Koning. IAEA NDS Document Series IAEA(NDS)-235 (2020). https://www-nds.iaea.org/talys/tutorials/exfortables.pdf 5. D.A. Brown, M.B. Chadwick, R. Capote et al. Nucl. Data Sheets 148, 1(2018).

Speaker: Nikita Fedorov (JINR; SINP MSU)

Presentation2.pdf

21 Experimental setup for elemental analysis using prompt gamma rays at research reactor IBR-2

The new experimental setup has been built at the 11b channel of the IBR-2 research reactor at FLNP, JINR, to study the elemental composition of samples by registration of prompt gamma emission during thermal neutron capture. The setup consists of a curved mirror neutron guide and a radiation-resistant HPGe high-purity germanium detector. The detector is surrounded by lead shielding to suppress the natural background gamma level. The sample is placed in a vacuum channel and surrounded by a LiF shield to suppress the gamma background generated by scattered neutrons. This work presents characteristics of the experimental setup. An example of hydrogen concentration determining in a diamond powder made by detonation synthesis is given and on its basis, the sensitivity of the setup is calculated being ~4µg.

Speaker: Константин Храмко (СИНЯВ ОЯФ ЛНФ)

AYSS_Alushta_XI_Hramco_C.pptx

22 Features of lipids deposition on a silicon substrate depending on their composition

Structural studies of the penetration of nanopreparations through the biological membrane of the cell, as well as detailed studies of the interaction of nanopreparations with the lipid bilayer, have not been carried out. To get a clearer picture of this interaction, it is first necessary to develop a method for applying a model membrane. The purpose of the experiment was to investigate the differences in the precipitation of soybean phospholipids with 80% purity and 100% purity and dimyristoylphosphatidylcholine (DMPC) using the method of time-of-flight neutron reflectometry. The experiment was carried out at the Joint Institute for Nuclear Research on a neutron reflectometer with a horizontal plane of the GRAINS sample. A cell with the possibility of washing was used. Solutions were prepared in heavy water with a phospholipid concentration of 1%.

Speaker: Varvara Maslova (Joint Institute for Nuclear Research)

23 Calculation of "static" and "dynamic" deformations (bending) of fuel rods of the NEPTUN reactor.

The report will show the features of the behavior of fuel claddings caused by uneven energy release in the reactor core. Thermal calculations were carried out, on the basis of which, using the ANSIS software, the forms of deformations, their dependence on the method of fixing the fuel rod were calculated.

Speaker: Maxim Podlesnyy (FLNP JINR)

Alushta_Podlesnyy_06_22.pdf

24 NEUTRON TOMOGRAPHY AND DIFFRACTION IN THE STUDY OF METAL OBJECTS OF CULTURAL HERITAGE

The study of cultural heritage by state-of-the-art scientific methods is an important interdisciplinary field [1,2 ]. Of interest are archaeological finds made of metal [3, 4]. Such artifacts store valuable information about the technological, economic and social level of ancient states. Corrosion processes occurring in metals also require careful study, because it improves restoration and conservation methodologies. However, research methods traditional in archeology are often unacceptable due to their destructive nature or give incorrect information due to the small depth of penetration. In such cases, neutron tomography and diffraction can be used. In this work, metal artifacts of various ancient states located on the territory of modern Russia were studied. Research was carried out at the facilities of the IBR-2 high-flux pulsed reactor: neutron radiography and tomography (NRT), DN-6 and DN-12 diffractometers [5, 6]. Using neutron tomography, spatial variations in the phase composition were visualized, the degree of degradation and the spread of corrosion were determined, and the original appearance of some artifacts was reconstructed. The phase composition was measured by neutron diffraction and Raman spectroscopy. The data obtained made it possible to shed light on aspects of the craft, to identify archaeological objects.

Speaker: Veronica Smirnova (FLNP JINR)

SmirnovaVS_AYSS-Alushta_2022.pdf

25 The simulation of very cold neutron transport in nanodiamond reflectors using Geant4

Efficient neutron reflectors are a key ingredient for improving the performance of cold, very cold and ultracold neutron sources, needed for meeting the challenges placed by high precision fundamental physics experiments and existing experimental techniques. In order to significantly increase the flux of these neutrons, the reflectors made of nanodiamond powders were proposed, theoretically substantiated and experimentally implemented. An adequate model of low-energy neutron propagation in nanodiamond powders was implemented in the Wolfram Mathematica software system. The performance of such a solution is sufficient for describing simple experiments on the reflection of very cold neutrons (VCNs) from nanodiamond powders and predicting the properties of such reflectors. However, it is not enough for simulating the real installations for the directional extraction, delivering and focusing of VCNs. In this work, we discuss the possibility to increase the performance of the VCN transport simulation using Geant4, a powerful toolkit for the Monte Carlo simulation of the passage of particles through matter. The aim of this work is to simulate the extraction of VCNs with velocities between 40 and 100 m/s from different geometries of nanodiamond reflectors comparing with the experimental data and results obtained in Mathematica. In the future, we suppose to take into account Bragg's diffraction of neutrons up to 2200 m/s on the crystal structure of nanoparticles and to use the computing power of the “Govorun” supercomputer to significantly increase statistics in simulations.

Speaker: Eyvaz Teymurov (FLNP JINR)

26 Preliminary results of measurements with a prototype setup for studying (investigation) the angular correlation of gamma quanta in reactions with neutrons.

One of the most interesting discoveries in the field of nuclear physics made in the 1970s and 1980s was the discovery of spatial parity violation during the fission of nuclei by polarized neutrons. It turned out that the probabilities of the emission of a light fragment along and against the direction of the spin of the initial neutron are different. The asymmetry value is about 10-4. Sushkov O.P. and Flambaum V.V. were the first who theoretically investigated and suggested that experimenters look for P-odd effects in p-wave resonances. In the 1970s, FLNP JINR accumulated extensive experience in working with polarized neutrons and polarized targets. And after the suggestion of Sushkov and Flambaum, experiments were carried out and already in 1981-82, the first results obtained at FLNP JINR on P-odd neutron dichroism in low-lying p-wave resonances were published. And almost immediately - a sensation: in the p-wave resonance with an energy of 0.75 eV of the 139 La nucleus, the effect of P-parity violation turned out to be 7 * 10-2. Over the course of 20 years, similar studies were carried out in several hundred p-wave resonances of various nuclei, but only in one of them did the effect turn out to be slightly higher. And work in this direction has stopped in recent years. In 2017-2018, new publications on this topic were published. At present, there is an opportunity to study correlations at the IREN facility at the FLNP JINR. We have begun measurements to study p-even correlations on Th, In, and Sn nuclei. A prototype of the installation has been created and the first preliminary results will be presented.

Speaker: Almat Yergashov (Joint Institute for Nuclear Research)

Yergashov Almat .pdf

27 Li ion batteries, anode materials

The rapid pace of economic development requires progressive improvements in modern energy storage devices such as lithium-ion batteries. One of the methods is the use of silicon, which in comparison with commercial carbon, has a higher efficiency in using silicon. Despite this, SiO2 has a number of disadvantages that limit its widespread use as an anode material for lithium-ionic materials associated with changes in volume during the movement of the first lithium, low electrical conductivity and short service life. To solve these disadvantages, an inexpensive and simple method is proposed for obtaining a hybrid SiO2 / C composite in a graphene shell. SiO2, carbon and graphene were obtained from biologically waste material - rice husk. The proposed inexpensive and scalable method for producing a hybrid SiO2 / C @ Graphene composite is a possible solution for creating the next generation of lithium-ion batteries. Today, lithium-ion batteries (LIB) are widely used and are an integral part of everyday human life due to their superior properties such as high energy density, long service life, high power density and low self-discharge rate . Nevertheless, the graphite used for the commercial production of LIBs, the theoretical capacity of which is 372 mAh / g, imposes significant restrictions on the manufacture of highly efficient LIBs. The development of new and / or improvement of existing technologies for the production of efficient anode materials with high specific capacity is a priority task for many research groups.

Speaker: Meir Yerdauletov (jinr)

28 The study of the objects of cultural heritage of the ancient Turkic cult-memorial complex using neutron tomography.

Archaeological objects, objects of cultural heritage have a special value due to their uniqueness, antiquity and existence in a single copy, therefore, the most justified is the use of modern methods of non-destructive testing for their research. One of such methods of non-destructive testing, which gives sufficiently complete information about the surface and internal structure of the objects under study, are the methods of neutron radiography and tomography. The nature of the interaction of neutrons with matter determines the high penetrating power of these methods and sensitivity to hydrogen-containing phases or components of the object under study. Differences in the total neutron absorption cross-section for different elements make it possible to visualize the distribution of inhomogeneities of composition or structure in the studied objects and materials, to obtain their three-dimensional (3D) model. This paper reports on the results of the study of metal objects of cultural heritage (weapons and household items) found in the cult-memorial complex of Eleke Sazy. The complex is located in Tarbagatay district of East Kazakhstan region. The cult-memorial complex of Eleke Sazy appeared on the site of the burning of the body of one of the khagans of the Western Turkic Khaganate. The appearance of the complex in these regions reflects the cultural processes in the center of Asia associated with the entry into the historical arena of the ancient Turks, their spiritual, ideological, religious and philosophical orientations. The features and spatial distribution of phases and the internal structure of metal objects were studied by neutron radiography and tomography at the experimental station TITAN on the 1st channel of the stationary research reactor WWR-K (Institute of Nuclear Physics, Almaty). Using neutron tomography, three-dimensional data on the spatial distribution of the chemical elements of the samples under study, as well as the features of the casting process, were obtained. Based on the results of these studies, corrosion occurring on the surface of copper or bronze finds was determined, which is important for the development of the methodology of restoration and preservation of valuable archaeological objects.

Speaker: Ayazhan Zhomartova (Joint Institute for Nuclear Research)

14:00 Lunch

15:00 Free time

18:00 Dinner

Plenary talks

29 Система управления проектами

Speaker: Artiom Samoshkov (JINR)

Quiz

Wednesday 8 June

08:30 Breakfast

Plenary talks

30 The Communication Strategy for an intergovernmental research organization in a new reality of international scientific dialogue: JINR’ case study

https://docs.google.com/forms/d/e/1FAIpQLSfKUX7YA7vAGdgnfsOZF0HBEm1kDQHLUkSjP5KLIn-uZRNiOA/viewform?vc=0&c=0&w=1&flr=0

Speaker: Irek Suleymanov (JINR)

Irek_Suleymanov_about.pdf

Irek_Suleymanov_Survey.pdf

31 Электроника и технические системы электронно-струнных источников ионов

Speaker: Dmitriy Ponkin (JINR)

Ponkin_D_Alu_2022.pdf

11:30 Coffee break

Sectional talks

32 Presentation of JSC TENZOR

Safety and fire extinguishing systems at nuclear power facilities

Speaker: Nicolay Golubev (JSC TENZOR)

33 Presentation of JSC TENZOR

Safety and fire extinguishing systems at nuclear power facilities

Speaker: Ivan Gumanovskiy

34 Applications of particle accelerators.

Review report on the application of particle accelerators in medicine and industry.

Speaker: Stepan Shirkov (Russia)

ALuShta 2022 Shirkov S..pdf

35 Influence of cluster structure to the mechanism of nuclear reactions

In the interaction reactions of weakly bound cluster nuclei, the structure of these nuclei can manifest itself with a high probability. It is expressed in cross sections for these processes, in particular, in the multinucleon transfer reaction and the transfer reaction of individual clusters. In order to study the influence of the cluster structure on the mechanism of nuclear reactions, we studied the interaction reactions 6Li+9Be,12C at an energy of 68 MeV. The experiment has been performed at the U-400M cyclotron, FLNR, JINR. The angular distributions of the products formed in these reactions were measured in the range of 10-120 º in the c.m system. The following reaction channels were studied: 9Be(6Li,6Li)9Be, 9Be(6Li,7Li)8Be, 9Be(6Li,6He)9B, 9Be(6Li, 4He)11B, 12C(6Li,6Li)12C, 12C(6Li,7Be )11B in ground and excited states. The obtained experimental data were analyzed within the framework of the optical model and the DWBA method.

Speaker: Talgat Issatayev (JINR,FLNR)

issatayev_talgat.ppt

36 Theoretical study of the reactions leading to production of new superheavy nuclei

The major goals of modern superheavy element physics are the production of superheavy elements with Z=119, 120 and the synthesis of neutron-enriched isotopes, thereby advancing to the center of the “island of stability” (the neutron shell with N=184). In this talk, a multidimensional dynamical model of nucleus-nucleus collisions based on the Langevin equations [1,2] has been used for analysis of reactions of 48Ca ions with actinide target nuclei. The cross sections of capture and fusion as well as the cross sections of evaporation residues for two combinations of colliding nuclei 48Ca+244Pu and 48Ca+248Cm have been studied. The possibilities of obtaining new neutron-enriched isotopes of superheavy elements in pxn channels have been analyzed. The analysis of the competition of quasi-fission and fusion-fission processes in the reactions leading to the formation of 119 and 120 elements has been done in the framework of the dynamical model.

Speaker: Nataliia Kurkova (FLNR JINR)

Presentation_Kurkova.pdf

37 Studies of the reference and satellite nuclear reactions in search for light neutron-rich nuclear systems.

Investigation of nuclear matter, located close and beyond drip-lines is a challenging experimental methodological task, due to short lifetime of the studied isotopes, low reaction cross section, complicated background conditions, etc. We have faced all of the mentioned difficulties in the recent studies of 6,7H systems, produced in interactions of 8He beam (26 MeV/nucleon) with cryogenic deuterium target. Such s investigations were available at the ACCULINNA-2 fragment-separator (http://aculina.jinr.ru/a-2.html) recently commissioned in FLNR JINR (http://flerovlab.jinr.ru/our-laboratory/). In order to verify the experimental approach, the satellite measurements with 10Be projectile have been conducted at the same detector setup. As the result of the reactions of the same mechanisms 8,9Li nuclei were produced. Data analysis of these reference reactions was in itself the calibration of all detector systems, and allowed to determine the energy resolution of the obtained missing-mass spectra. Another important applied procedure of the data analysis was the studies of the satellite reaction channels. The latter may provide the same reaction products, which would affect the obtained missing-mass spectra as a background events. We have studied such possible reaction as 8He(d,3H)7He, 8He(d,5H)5He, 8He(d,4H)6He and the 8He+d quasi-free scattering as well. The possible contribution of all background channels to the low energy spectrum of the 6H was studied. The mentioned techniques have been a key and advantage of the conducted experiments and allowed to obtained new significant results in solving the problems of the extreme heavy hydrogen isotopes, described in [I. A. Muzalevskii, et al., “Resonant states in 7H: Experimental studies of the 2H(8He,3He) reaction”, Phys. Rev. C 103, 044313 (2021)], [ E. Y. Nikolskii, et al., submitted to Phys. Rev. C https://arxiv.org/abs/2105.04435]. These works briefly shows the reference reaction studies, but the full description will be a part of the Ph.D, thesis and presented in a conference talk.

Speaker: Ivan Muzalevskii (JINR)

presentation.pdf

38 Experimental methods for total reaction cross section measurements in the interaction with exotic nuclei

A short review and analysis of the experimental techniques for total reaction cross section σR measurements are presented. The most part of the techniques is based on the transmission and 4π methods. The transmission methods are used the detection of the particles hitted the target and pathed through the target without any interactions. The 4π-methods are used the detection of the reaction products (prompt γ-quanta and neutrons) together with the particles hitted the target. The reaction products are detected by 4π scintillation spectrometer. The main attention of the report is focused on the 4π methods designed at FLNR JINR, Dubna. These methods have been developed for σR measurements of the reactions with light neutron–rich weakly bound nuclei like 6,8He, 8,9,11Li and 10,11,12Be. The comparison of σR 6He+28Si reactions measured by transmission and 4π methods is presented.

Speaker: Sergey Stukalov (FLNR JINR)

39 Measurement of detailed transverse beam distribution by non-destructive diagnostic method based on residual gas ionization

The constant monitoring of the uniformity of the density distribution of the flux of the accelerated particles is required in various applied fields as such as the studies of biological objects and of radiation resistance of electronic devices. The ionization monitor has been developed at FLNR JINR in order to make the non-destructive detailed high precision measurement of the transverse profile of a wide beam of accelerated particles. The monitor design is aimed at measuring the concentration of residual gas ions arising along on the beam path. The distribution of the ions is proportional to the distribution of the particle flux density. The ions are extracted from the beam region by a constant electric field larger than 0.2 kV/cm and then are accelerated by a sawtooth voltage with a frequency of 2 Hz. During the extraction the ions get the kinetic energy proportional to the distance traveled in a constant field and to the value of the subsequent accelerating voltage. The extracted ions enter two consecutive electrostatic analyzers separated by a plate with 1 mm slit. Ions can enter the second analyzer through this slit only if they were created in a narrow beam region, which position depends on the value of the sawtooth voltage. The monitor sensitivity is increased by MCP (Micro channel plate) placed after the analyzers. The collector divided into 31 strips is located after the MCP. The current from the strips is digitized by several ADC (Analog to digital converter) channels. The first coordinate of the ion formation position is determined by the number of the collector strip. The second coordinated is extracted from the value of the sawtooth voltage measured by another ADC. The number of employed ADCs allows every second measurement of a detailed two-dimensional distribution with 31x31 points on a beam cross section up to 45 mm in diameter. Because the ions of the residual gas are collected from the beam path 90 mm long, the sensitivity of the monitor is almost two orders of magnitude higher than the existing analogs [1, 2]. The monitor can also be used to measure the profile of secondary beams.

Speaker: Konstantin Timoshenko (Dmitrievich)

Alushta2022_Presentation_Timoshenko.pptx

40 JINR PROCUREMENT PROCEDURES

The objectives of the procurement activities are: - complete satisfaction of JINR's needs for products of the required quality, at the required price and time; - expanding opportunities for the participation of legal entities and individuals - suppliers from the countries participating in the Institute in the supply of goods, works, services for the needs of the Institute and creating preferences for them to participate in the procurement activities of the Institute; - introduction of a systematic approach to planning and implementation of procurement policies; - ensuring transparency and impartiality of procurement

Speaker: Аурика Войтишина (Служба материально-технического снабжения)

41 Flagship project for the development of socio-economic support for the Institute's employees using additional financial instruments

Now the Institute already provides various types of social support and has introduced benefits for certain categories of employees (for example, milk coupons, medical nutrition, lunch cards, etc.). Employees also have the right to preferential attendance at cultural events (cultural center "Mir"), swimming pool ("Archimed"), as well as medical care ("white" medical policy) and sanatorium treatment ("Dubna" in Alushta). From the point of view of accounting, these initiatives are a kind of monetary equivalent for internal settlements with employees of the organization. Theoretically, such financial projects based on additional (complementary) currencies and their corresponding payment systems are able not only to provide various socio-economic support to employees, but also to effectively centralize such provision throughout the organization, thereby contributing to the formation of its ecosystem.

Speaker: Lubov Shiryaeva

14:00 Lunch

Plenary talks

42 Management and development of the topical plan for JINR research and International cooperation: history, current status and future steps

Speaker: Dmitry Korobov (JINR)

43 Управление социальной инфраструктуры

Speaker: Andrey Tamonov (USI JINR)

17:00 BBQ

Thursday 9 June

08:30 Breakfast

Free time

14:00 Lunch

15:00 Free time

18:00 Dinner

Friday 10 June

08:30 Breakfast

Plenary talks

44 История развития циклотронов тяжёлых ионов. Лаборатории ядерных реакций им.Г.Н. Флёрова 65 лет

Speaker: Boris Gikal (JINR)

45 JINR approach to international cooperation: Egypt case study

Speaker: Elena Badawy (JINR)

11:30 Coffee break

Plenary talks

46 Мониторинг деятельности ОИЯИ

Speaker: Olga Krupa

Sectional talks

47 The nuclear modification factor in Au-Au at a collision energy of 27 GeV at the STAR.

STAR experiment at RHIC has performed the Beam Energy Scan (BES) program, aimed to study energy dependence of properties of the quark-gluon plasma (QGP) formed in the collision of heavy ions. One of the features observed in the study of the QGP was the effect of suppression of particle with high transverse momentum $p_T$ \textil{(> 2 GeV/c)} production. This effect was observed on the data from first stage of BES. Quantitatively this effect can be measured by the nuclear modification factor ($R_{CP}$). In 2018, the second phase of the BES program has started. Data on Au+Au collisions were collected at the energy of $\sqrt{S_{NN}}= 27 GeV/c$. In this report we demonstrate our measurements of the particle spectra and the nuclear modification factor $R_{CP}$ for unidentified charged particles, and comparison with BES-I measurements.

Speaker: Alisher Aitbayev (JINR)

48 Nuclear modification factor in the heavy ion collisions in beam energy scan program at STAR experiment.

At high temperatures and baryon densities, a new state of hadronic matter, the quark-gluon plasma (QGP), is expected to emerge. Such conditions can be created in heavy ion collisions at modern colliders. One of the indicators of the occurrence of QGP in these collisions is the behavior of the nuclear modification factor, i.e., the ratio of the transverse momentum spectra normalized to the number of binary collisions in central events to peripheral ones. My work is devoted to the calculation of this factor at various energies in Au + Au collisions at the Relativistic Heavy Ion Collider (Brookheaven National Laboratory, USA) as part of the Beam Energy Scan II program in the STAR experiment.

Speaker: Stepan Manukhov

49 Z-bozon polarization study with the CMS experiment at the LHC

The Drell-Yan process is extremely important for the physics of hadron colliders. Measuring its characteristics is a critical test of the Standard Model at new energies. In particular, the coefficients of the harmonic polynomials describing the angular distributions of the leptons emission are sensitive to the (V - A) structure of weak interactions and can be indicators of the higher orders effects and QCD twists, as well as the nontrivial QCD vacuum structure, reflected in the correlation of parton spins and their nonzero momentum in the initial state. Modern experimental data at the Large Hadron Collider make it possible to significantly expand the range of the transferred 4-momenta to several TeV, which opens up new possibilities to search for physics beyond the Standard Model.

Speaker: Vladislav Shalaev (JINR, Dubna State University)

Shalaev_Alushta22.pdf

50 Searches for new physics in the dilepton channel with the CMS detector at the LHC

The search for new neutral gauge bosons decaying to a dilepton final state spectra has been performed using data obtained in Run 2 in 2016-2018 in proton-proton collisions at sqrt(s)=13 TeV with the CMS experiment at the LHC. The data correspond to integrated luminosity of 140 fb^(-1). The results are in good agreement with the predictions of the standard model. Limits on the production cross section and masses of new narrow signals have been set.

Speaker: Ilia Zhizhin (JINR)

Zhizhin_Alushta.pdf

51 Analysis of the rare K^{+}→e^{+}v µ^{+}µ^{−} decay at NA62

The main goal of the NA62 experiment at CERN is to measure the probability of the ultra-rare K^{+} → π^{+}vv decay. The collected statistics for 2016-2018 years, allows us to analyze other rare decays, in particular, K^{+}→e^{+}v µ^{+}µ^{−}. Since the inner bremsstrahlung (IB) for K^{+}→e^{+}v µ^{+}µ^{−} decay is suppressed (0.03%), this decay is well suited for measuring form factors (F_{V} , F_{A}, and R). The chiral perturbative theory (ChPT) prediction of the decay probability K^{+}→e^{+}v µ^{+}µ^{−} with a value of 1.12 ∗ 10^{−8} is known. The previous experimental result is (1.7±0.5) ∗ 10^{−8} . We present the research methodology, the first results of signal selection, and the study of the background sources for the decay.

Speaker: Dosbol Baigarashev (JINR)

BaigarashevD_Alushta2022.pdf

52 Cryogenic liquid hydrogen targets for experiment SRC.

The report presents the results of the participation of a liquid hydrogen target with double helium cooling and a target with cryocooler cooling at the BMN facility under the program of the SRC international physical experiment. Namely, the criteria for selecting target parameters, design features and manufacturing technology, comparison of targets with the indicated types of cooling, experimental data obtained and accumulated experience in the last sessions of the NIKA accelerator complex are considered.

Speaker: Дмитрий Климанский (НИКО, ЛФВЭ, ОИЯИ)

53 Elliptic flow fluctuations at NICA energy regime

The anisotropic flow, in particular the elliptic flow v2, is a key observable sensitive to the transport properties of the strongly interacting matter produced in relativistic heavy-ion collisions. In this work, we show the magnitude and the skewness of elliptic flow fluctuations in the framework of several models of relativistic heavy-ion collisions at NICA energy regime. The agreement of v2{4}/v2{2} cumulant ratio observed in the models supports the pattern that the elliptic flow fluctuations in the momentum space mainly originate from fluctuations of nucleons-participants in the coordinate space in the initial stages of relativistic heavy-ion collisions.

Speaker: Vinh Luong (VBLHEP JINR)

VinhLuong_v2_fluctuations_MPD_NICA.pdf

54 Software method of determination of the event collision time with the ToF detector of the MPD at the NICA.

Particle identification is an important feature of the MPD detector at the NICA. For particle identification via the time-of-flight technique, the precise determination of the event collision time represents an important ingredient of the quality of the measurement. In my work, the software method used for such a measurement in MPD by means of the event collision time and the TOF detectors are reviewed. Efficiencies, resolution and the improvement of the particle identification separation power of the method used are presented for the Monte Carlo simulation data.

Speaker: Victor Baryshnikov

Software method of determination of the event collision time with the ToF detector of the MPD at the NICA JINR Association of Young Scientists and Specialists Conference "Alushta-2022" pres.pdf

55 Simulation and reconstruction of electron drift velocity for MPD TPC.

Laser calibration system is a necessary part of the MPD TPC (Time-Projection Chamber) and allows to on-line measure velocity of electrons drifted in the TPC volume. Knowing of electron drift velocity is required to precise reconstruction of track points. Simulation of laser calibration system is needed to test approaches for drift velocity calculations. An approach of drift velocity determination is based on goals of fast calculations and excluding the need to search for the position of individual beams of laser calibration system. This developing is a part of MPDRoot software for the MPD experiment.

Speaker: Alexander Bychkov (LHEP)

Bychkov alushta 2022.pdf

56 Theory and simulations of highly charged ion beam emittance, extracted from EBIS\ESIS ion source: influence of the magnetic field, the dip of the electron beam\string potential and the ion beam space charge.

Ion beam emittance is vital for the evaluation of the extracted beam properties. The transverse emittance, horizontal or vertical, is a measure of the parallelism of the beam and it is proportional to the area filled by the ion trajectories in the phase space plot. In this study we use both analytical and numerical approaches towards definite understanding of a transvesre dynamics for highly charged ion beams extracted from ESIS Krion-6T - main ions source for injection complex of NICA\MPD project. We study beam dynamics and its contribution into transverse ion beam emittance, caused by three, rather independent, factors: 1) crossing of ESIS solenoid magnetic flux by the ion beam extracted from ESIS paraxially; 2) ions temperature prior their extraction from ESIS ion trap; 3) ion beam space charge contribution in to emittance. For the p.-p 1)- 2) above we found a good correspondence between the analytical estimates and our numerical calculations for various essential parameters. We have confirmed that for sources of the EBIS/ESIS type, the contribution to the transverse emittance from the temperature of ions significantly exceeds the "magnetic field contribution". Space-charge contribution to the transverse emittance is a strongly nonlinear problems and it was attacked numerically with use of CST code. Final results will be discussed in framework of injection efficincy estimation for the present configuration of NICA injection complex: transverse ion beam emittance, extracted from Krion-6T ESIS, versus RFQ-HILAC acceptance.

Speaker: Elizaveta Butenko (JINR, LHEP, Dubna 141980)

Butenko_E_A.pdf

57 The State of the Magnetic Measurements of the NICA Collider Twin-Aperture Quadrupoles

Magnetic system of the NICA collider includes 46 twin-aperture superconducting quadrupole magnets. The magnetic field measurements of each magnet in operating mode are carried out during assembly and testing of modules. For the time being 75% of the magnets are successfully passed the tests.This paper describes magnetic measurements methods, the development of the dedicated system for quadrupole magnets of the NICA collider, state of serial magnetic measurements and results of test at helium temperature.

Speaker: Ilya Donguzov (Igorevich)

Donguzov Alushta-2022.pptx

58 Simulation of the dynamic aperture of the NICA booster synchrotron based on magnetic measurement data

Dynamic aperture (DA) is one of the key characteristics for any accelerator facilities. The estimation of the lattice elements errors (nonlinearities and integral field value errors, misalignment of the elements etc.) and beam correction system influence at DA are the milestone stage during construction of the facility. Also, the value of the DA is ought to be sufficient (be in excess of the beam pipe dimensions). The report studies methods of the DA calculation for the NICA booster synchrotron in MAD-X software among other factors including symplectic tracking algorithm PTC (Polymorphic tracking code). The results of the magnetic measurements of the lattice elements and influence of the the chromaticity and sextupole errors of magnets correction system were taken into account.

Speaker: Mr Mikhail Shandov (Joint Institute for Nuclear Research, Veksler and Baldin Laboratory of High Energy Physics)

Shandov_MM_DA_pres.pdf

15:00 Lunch

Plenary talks

59 JINR Seven-Year Plan

Speaker: Dr Grigory Trubnikov (JINR)

Free time

18:00 Dinner

Saturday 11 June

08:30 Breakfast

Plenary talks

60 Computing for physics : from an experimental facility to a researcher's laptop

Speaker: Danila Oleynik (JINR LIT)

Oleynik_Alushta_2022.pdf

61 Black holes, holography and strongly-coupled quark-gluon plasma

Speaker: Anastasia Golubtsova (Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research)

Golubtsova-talk.pdf

11:30 Coffee

Sectional talks

62 System for planning and logging excursions at JINR

One of the tasks of the JINR organizational activity is to conduct excursions in the Institute's laboratories for different types of target audience and age groups. The organization of each excursion goes through a number of steps related to negotiation of excursion time, availabiolity of the facility and the guide. All negotiation were carried out through telephone and email conversations between excursion organizer and responsible persons from laboratories. As a result, by the end of the year, it was not a trivial task to calculate the number of excursions conducted, as well as to prepare statistics related to the excursion activity of laboratories. The purpose of this work is to automate the processes of data collection during organization of excursions in JINR laboratories. This can be achieved through the design and implementation of an information system. It was decided that the system should be organized as a web application. It was developed and deployed in February 2022. Right now it is used by University Center of JINR and some guides from laboratories.

Speaker: Anna Ilina (Joint Institute for Nuclear Research)

Alushta2022.pdf

63 MOLECULAR DYNAMICS(MD) SIMULATION OF LIPODISK

Speaker: Mr Nurzada Saktaganov (University Dubna)

64 Development of a Cloud Service for Scientific Computing on the MICC

The JINR Multifunctional Information and Computing Complex (MICC) provides several computing resources operated by diverse systems with different user interfaces. Therefore using the complex at full capacity can be challenging for scientists and users. The cloud service was developed at the Meshcheryakov Laboratory of Information Technologies. The goal of the service is to give simple access to MICC resources and software by a single entry point via a web interface and hide the complexity of MICC structure. Currently, the service provides a set of applications for researching Josephson junctions. The project’s current state and future developments are presented in this report: admin panel access control system, interface for managing applications.

The work is supported by the Russian Science Foundation grant, project #18-71-10095.

Speaker: Ivan Sokolov (Alexandrovich)

Alushta_2022_v2.pdf

65 JINR Institutional Repository

Nowadays scientific communication plays an important role in providing society and researchers with scientific information. One of the components of communication is providing access to publication with the scientific output of researchers. Open scientific infrastructures like open access repositories, institutional repositories and Open Access journals helps to bring knowledge to readers. The different open source software for repositories will be considered, and the possibility for using this software as JINR institutional repository will be presented.

Speaker: Tatiana Zaikina (JINR, LIT)

ZAIKINA_MLIT.pdf

66 Interplay of dineutrino modes with semileptonic rare B-decays

Semileptonic flavor changing neutral current transitions with a pair of neutrinos in the final state are very accurately determined in the standard model (SM) and thus provide an accurate and sensitive probe for physics beyond the SM. Until recently, the poor tagging efficiency for the B -> K(∗)vv modes made them less advantageous as a probe of new physics (NP) compared to the charged lepton counterparts. The most recent Belle II result on B -> Kνν uses an innovative inclusive tagging technique resulting in a higher tagging efficiency; this together with previous BaBar and Belle results indicates a possible enhancement in the branching fraction of B+ ->K+νν. A reanalysis of the full Belle dataset together with upcoming Belle II dataset is expected to result in a much more precise measurement of this mode. If the branching ratio is indeed found to be enhanced with improved measurements, this would provide an unambiguous signal of NP without uncertainties due to long-distance non-factorizable effects or power corrections (in contrast to B-> Kll). We have explored the possibilities of such an enhancement as a signal of NP in scenarios with additional Z'-boson, which can also explain some of the other tensions observed in neutral as well as charged current B-decays. In an effective field theory approach, with the most general dimension-six Hamiltonian including light right-handed neutrinos, we explore the parameter space possible with a generic vector gauge boson Z' model assuming minimal new particle content. While being consistent with all data, correlations between the observed intriguing discrepancies in B-decays are also obtained, which will discriminate between the various NP scenarios.

Speaker: Alfiia Mukhaeva

Round Table

14:00 Lunch

15:00 Free time

18:00 Dinner

Closing ceremony

19:30 Farewell party

Sunday 12 June

08:30 Breakfast

Free time

Departure