One of the most popular explanations for the smallness of the neutrino mass is the seesaw mechanism [1], in which the neutrino should be a Majorana fermion. The concepts of C and CPT conjugations play an important role in the theory of Majorana fermions. We have shown that in the literature there are five nonequivalent concepts of charge conjugation (C1 - C5) and, accordingly, five...
Much attention is paid to the problem of creating nuclear optical clocks and, accordingly, the next generation frequency standard. Record samples of atomic clocks demonstrate an error within several units of 10โ18, while in order to solve challenging fundamental and applied problems it is necessary to further reduce the errors by another order of magnitude. The development of heavy-ion clocks...
Current studies of neutrino-nucleus interactions have come to a situation where it has become both possible and necessary to study in detail the capture of neutrinos by nuclei. In this paper we study the interaction of high-energy neutrinos from the SNS accelerator with the detector based on the Iodine-127 [1]. We calculate the resonance structure of the charge-exchange strength function...
ะก.ะ. ะกะตะผะตะฝะพะฒ
ะัััะฐัะพะฒัะบะธะน ะะฝััะธััั
ะฅะฐัะฐะบัะตัะธััะธะบะธ ัะตะฐะบัะธะธ ะฟะพะณะปะพัะตะฝะธั ะฝะตะนััะธะฝะพ ัะดัะพะผ 82Se โ ะฝะธะทะบะพะต ะทะฝะฐัะตะฝะธะต ะฟะพัะพะณะฐ, ะพะฑัะฐะทะพะฒะฐะฝะธะต ะณะฐะผะผะฐ-ะบะฒะฐะฝัะฐ ั ัะฝะตัะณะธะตะน 75 ะบัะ ะพะดะฝะพะฒัะตะผะตะฝะฝะพ ั ะฒะพะทะฝะธะบะฝะพะฒะตะฝะธะตะผ ัะปะตะบััะพะฝะฐ [1], ะฒััะพะบะพะต ะทะฝะฐัะตะฝะธะต ัะตัะตะฝะธั ะฟะพะณะปะพัะตะฝะธั ะฝะตะนััะธะฝะพ, ะธะทะปััะฐะตะผัั
ะธััะพัะฝะธะบะพะผ 51Cr [2], ะดะตะปะฐัั ะบัะธััะฐะปะปั Zn82Se ะฟะตััะฟะตะบัะธะฒะฝัะผ ะผะฐัะตัะธะฐะปะพะผ ะดะปั ะฟะพะธัะบะฐ ะฝะพะฒัั
ัะธะฟะพะฒ ะฝะตะนััะธะฝะพ ะฒ ะบะฐะปะธะฑัะพะฒะพัะฝัั
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ะขะตะทะธัั ะธ ัะฐะทัะตัะตะฝะธั ะฒ ะฟัะธะบัะตะฟะปะตะฝะฝัั ัะฐะนะปะฐั
A concept of SrI2(Eu) scintillation neutrino detector with ultra-low energy threshold is being developed in INR RAS to detect recoil electrons with energy lower than 1 keV. The detector will have a simple scalable structure and consist of 64-channel layers of scintillation detector modules. The modules consist of four small SrI2(Eu) crystals with SiPM readout. The detector can be used to study...
The famous Blandford-Znajek mechanism or process (Blandford R.D., Znajek R.L. Mon. Not. R. Astr. Soc. 179 433 (1977)) explains the formation of relativistic jets from the fast-rotating accreting black hole due to the electric current trough black hole event horizon. The working efficiency of the Blandford-Znajek mechanism is justified recently by numerous numerical simulations of the General...
The experiment nuGeN investigates neutrino properties at Kalinin nuclear power plant (KNPP, Udomlya, Russia) [1]. The experimental setup was installed under the third unit of the KNPP at a distance of 11.1-12.2 m from the reactor core. The enormous antineutrino flux at this place of (3.6 - 4.4)*10$^{13}$ $\nu$/(cm^2 sec), good overburden of 50 m w.e. and suitable background conditions provide...
Detector DANSS detects antineutrino flux from the 3.1 GW industrial nuclear reactor VVER-1000 of the Kalinin Nuclear Power Plant at distances 10.9, 11.9, 12.9 meters over 8 years. By 2024 statistics of more than 8 million inverted beta decay events have been collected. New analyses of the data exclude a large area of parameters for hypothetical short base reactor neutrino oscillations to...
The Borexino detector was a low-background real-time liquid scintillator setup with primary focus on solar neutrino spectroscopy. The detector has been in operation since May of 2007 up until October of 2021 at the underground facilities of Gran-Sasso National Laboratory.
Here, we present the results of our search for correlations between Borexino signals and known astrophysical transients...
on behalf of Daya Bay Collaboration
Modern neutrino physics contains a few anomalies that can not be described by the three-neutrino mixing and oscillation framework. Reactor neutrino experiments observed a deficit of the anti-neutrino flux at $2.5 \sigma$ level with respect to the prediction (Huber-Mueller model). Gallium detectors for solar neutrinos observed a deficit of events from...
The SHiP (Search for Hidden Particles) experiment is a new fixed-target experiment to be installed at the CERN SPS ring with a 400 GeV proton beam energy. The primary goal of the experiment is to detect signals from the Hidden Sector particles, introduced to describe dark matter, baryon asymmetry, and small neutrino masses. To suppress background, an iron magnetized hadron absorber and a muon...
The phenomenological model with three active and three light sterile neutrinos is considered taking into account terrestrial experimental data, which indicate anomalies at short distances beyond the minimally modified Standard Model with three massive active neutrinos [1, 2, 3, 4]. One of the sterile neutrinos is assumed in this work to have comparatively different mass versus masses of two...
The lanthanides traces discovery in the kilonova spectra after recording a gamma-ray burst and gravitational waves [1] confirmed theoretical scenarios for the development of the r-process [2], associated with the neutron stars merger at the end of a close binary system evolution. After successful r-process simulation that occurs as a result of the neutron stars merger and observing these...
Ricci-Gauss-Bonnet (RGB) gravity based on a pure geometric Lagrangian that is defined by a specific dimensionless combination of the Ricci (R) and Gauss-Bonnet (G) scalars is suggested and discussed as a possible viable generalization of the General Relativity (GR). Within the Parameterized Post-Newtonian (PPN) formalismย it is shown that RGB gravity has the same values of PPN parameters as...
ะะทััะตะฝะธะต ัะฒะพะนััะฒ ะฑะฐัะธะพะฝ-ะฑะฐัะธะพะฝะฝัั ะฒะทะฐะธะผะพะดะตะนััะฒะธะน ัะฒะปัะตััั ะฝะฐ ัะตะณะพะดะฝััะฝะธะน ะดะตะฝั ะฐะบััะฐะปัะฝะพะน ัะตะผะพะน ะธััะปะตะดะพะฒะฐะฝะธะน ะฒ ะพะฑะปะฐััะธ ัะดะตัะฝะพะน ัะธะทะธะบะธ. ะัะธ ััะพะผ ะณะธะฟะตัะพะฝ-ะฝัะบะปะพะฝะฝัะต ะธ, ัะตะผ ะฑะพะปะตะต, ะณะธะฟะตัะพะฝ-ะณะธะฟะตัะพะฝะฝัะต ะฒะทะฐะธะผะพะดะตะนััะฒะธั ะธะทััะตะฝั ะณะพัะฐะทะดะพ ั ัะถะต, ะฝะตะถะตะปะธ ะฝัะบะปะพะฝ-ะฝัะบะปะพะฝะฝัะต. ะะพะดั ะพะดััะตะน ััะตะดะพะน ะดะปั ะธะทััะตะฝะธั ัะฒะพะนััะฒ ะฑะฐัะธะพะฝะฝัั ะฒะทะฐะธะผะพะดะตะนััะฒะธะน ัะฒะปััััั ะฝะตะนััะพะฝะฝัะต ะทะฒัะทะดั, ะฟะพัะบะพะปัะบั ะธั ะผะฐัะตัะธั ัะพััะพะธั ะธะท ะฑะฐัะธะพะฝะพะฒ ะธ...
Neutrino propagation in the Galactic magnetic field is considered. To describe neutrino flavour and spin oscillations on the galactic scale baselines an approach using wave packets is developed. Evolution equations for the neutrino wave packets in a uniform and non-uniform magnetic field are derived. Analytical expressions for neutrino flavour and spin oscillations probabilities accounting for...
The Sarov tritium neutrino experiment (SATURNE) is part of the scientific program of the National Center for Physics and Mathematics (NCPM) [1] that was founded in Sarov in 2021. The experiment is under preparation, with the first taking of data expected for 2025 and the data collection expected to be completed by 2032.
SATURNE is motivated by fundamental problems in neutrino physics....
An extreme high intensive neutron pulses ensure the conditions for pulse
nucleosynthesis realized in nature (at neutron concentration >10E+19 cm-3): at different mechanism of supernova explosions, in very massive stars, at merging and destroying of neutron stars). In the artificial condition the nucleosynthesis can occur in the close zone of nuclear/thermonuclear explosions where the neutron...
The energy-density functional in the form proposed by Fayans has proved to be convenient and efficient for describing a large class of nuclear phenomena from nuclear masses and radii to proton and neutron density distributions and decay probabilities. Originally the parameters of the potential functional (FaNDF0) were tuned to reproduce the variational calculations of the nuclear equation of...
The dynamics of neutrinos in hot and dense magnetized matter, corresponding to dynamo-driven supernova explosion, is considered. It is shown that taking into account fluctuations in the interaction of neutrinos with matter leads to the Fokker-Planck equation for the dynamics of the distribution function in the phase space. The component of the kinetic equation additional to the transfer effect...
The report presents the results of a series of papers on modelling the nuclear physical processes in the outer layers (crust) of neutron stars in low mass X-ray binaries. In these systems, material is transferred from the companion star to the neutron star, a process known as 'accretion' in astrophysical literature. As a result, the original crust is replaced by accreted material.
We...
