Description
https://jinr.webex.com/jinr/j.php?MTID=meb12aaca113321b28f8c123868a1ac0f
MiniSPD is setup for cosmic muon tests. MiniSPD includes most of types of detectors that will be used in SPD detector . Detectors and readout electronics for the NA64 experiment were used as the main test object. The MiniSPD setup includes a scintillator trigger system, straw, silicon and GEM trackers, an electromagnetic calorimeter, and a lead filter to remove low energy components of...
We present a study of centrality class determination based on number of charged particles registered with Time Projection Chamber in Multi-Purpose Detector at NICA complex. Precise determination of centrality classes will allow to select the ion collisions within a certain class of initial conditions in order to study behavior of some variables on the mean energy densities reached.
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The Multi-Purpose Detector (MPD) is one of the experiments of the NICA collider in Dubna. The construction of MPD consists of many detectors and components for study of quark-gluon plasma. The main purpose of Electromagnetic Calorimeter (EMC) is to measure the coordinates and energy of electrons, positrons and photons generated in heavy ion collisions. Due to its high temporal resolution, the...
Fragments charge has been measured with the forward hodoscope (FWall) in the HADES experiment for Ag+Ag@1.58AGeV and Au+Au@1.23AGeV. First results on the nuclei fragments description with the framework of the DCM-QGSM-SMM model and comparison with the experimental data will be presented. The description of the fragments' charges with the model is a crucial task for centrality determination and...
BM@N (Baryonic Matter at Nuclotron) is the first experiment with a fixed target at the NICA Facility at JINR (Dubna). It is designed to study nuclear-nuclear collisions at high densities. Nuclotron provides heavy ion beams with energies ranging from 2.3 GeV to 4.5 GeV, which is suitable for studying strange mesons and multi-strange hyperons close to the kinematic threshold.
In the...
Neutrinos have a special place in the physics of elementary particles. Neutrinos are the lightest particles, leptons that can change their flavors, i. e. oscillate, propagating through the vacuum or matter. Neutrino oscillations are a phenomenon that has been activity studied during the past decades and have a lot of undecided problems at the moment. Working now accelerator experiments, such...
Far Detector of the NOvA experiment is located on the surface unlike most of the neutrino detectors. This fact allow us to study cosmic rays in there. One can measure atmospheric muon fluxes and explore their angular dependences. But this research is complicated by the fact that Fsr Detecor overburden and the rock surrounding it are also asymmetrical
HADES is a large acceptance spectrometer operating at SIS18, GSI, Germany. It is aimed at exploration of QCD phase diagram at the ion beam energies of 1-2 AGeV in the region of high hadron densities. HADES setup includes a superconducting toroidal magnet, sets of drift chambers, ring-imaging Cherenkov detector, TOF systems and a new electromagnetic calorimeter (ECAL).
The Ecal detector...
A test bench for determining the wire tension of gaseous detector was designed. The tension of the wires is checked by measuring the resonant frequencies of their vibrations. In this work the development of the key modules of the test bench and the corresponding software are presented. The results of stand testing during the production of detectors for the SPD Muon System Prototype (NICA/JINR)...
This work presents the results of Monte Carlo simulation of the
experimental setup for study the Compton scattering of annihilation
photons in GEANT4. The pair of entangled annihilation photons is born as
a result of electron-positron annihilation at rest. The experimental
setup consists of Compton polarimeters that include the plastic
scatterers and two groups of NaI(Tl) detectors...
A comparison is made of the average pseudorapidity distributions <η> of secondary particles produced in interactions of 197Au gold nuclei with an energy of 10.7 A GeV and 208Pb 158 A GeV lead nuclei with emulsion nuclei Em for events of different types.
To understand the mechanism of formation of the final states of secondary particles, the parameters of interaction fragmentation were...
The energies of cosmic particles have been measured quite accurately for particles with energies E <0.1 TeV. Modern magnetic spectrometers can determine the primary energy with an error of less than 10 percent. However, such devices are limited at energies E> 1 TeV. In the region of 1-100 TeV, there is a lack of measurement methods. In this regard, various space experiments present extremely...
Experiments on the study of colliding beams have great potential for studying the formation of secondary particles in relativistic nucleus-nucleus interactions. But, unfortunately, they do not have enough information about the initial stage of interaction. In this regard, it is difficult to separate dynamic fluctuations associated with the formation of quark-gluon plasma from fluctuations...
The reaction $pp → dπ^+$, which is a classical method of studying $NN$ interactions, has two peaks in the energy dependence of the differential cross section at zero angle $dσ(0)/dΩ$. The first one is located in the region of the sum of the $NΔ(1232)$ masses, $√s ≈ 2.15$ GeV. When analyzing the ANKE-COSY data, a similar peak was found in the reaction $pp →\{pp\}_Sπ^0$, the spin-isospin...
Long-lived particles are featured in many beyond-the-Standard Model theories. Produced in proton–proton (pp) collisions, they can come to rest within the ATLAS detector to decay some time later. The analyzed dataset is composed of pp–collisions delivered by the Large Hadron Collider at a centre-of-mass energy of √s=13 TeV and collected by the ATLAS experiment during 2017 and 2018. To detect...
The Drift Chambers along with the Cathode-Strip Chambers form the outer tracker of the BM@N experiment. The full reconstruction chain for both MC and experimental data was developed and implemented into the official software.
The results of the reconstruction of Run& Bm@n data are compared to simulated data. Main performance parameters are estimated and analyzed.
Updated results of measurements of angular coefficients for Z bosons produced in pp collisions and decaying to mu+mu- is presented. Results of MC simulation and data collected by the CMS detector during the LHC Run-I (2011-2012) and Run-II (2016-2018) were used.
The Geant4 toolkit is a common instrument for the simulation of the experiments in high-energy physics. This work discusses the fixed target experiment NA64 CERN, its main goals and objectives. The model of the installation, implemented using the Geant4 package, is presented. The results of the run a simulation of a particle beam are discussed and analyzed, and physical conclusions are given.
The geometry of collisions in experiments with heavy ions can be determined by forward hadron calorimeters. The forward hadron calorimeters of the BM@N and MPD experiments have a design feature, namely, the presence of a hole for the beam in the center of the detector. This feature leads to the need to develop special methods for determining centrality, one of which is the use of machine...
CL’s one of the statistical method to explore the physics beyond the Standard Model. This method was used to set lower bounds on the Higgs boson mass. In neutrino physics, it could be used to estimate bounds of parameters of neutrino oscillations.
The base for realization CL’s method is Global Neutrino Analysis (GNA) framework, developed in JINR, Dubna. The main result of my work is a module...
Studying electron-positron annihilation into $K_SK\pi$ and $K_SK\pi\pi^0$ with the CMD-3 detector
A. A. Uskov.
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences.
We studied the process $e^+e^- → KK\pi$ with the СMD-3 detector at the electron-positron collider VEPP-2000. The statistics collected by the СMD-3 detector in the energy range of...
