The Forward Hadron Calorimeter (FHCal) is one of the sub-detectors of MPD/NICA (Nuclotron-based Ion Collider fAcility). FHCal consists of two arms, each containing 44 modules. Modules have longitudinal segmentation and are divided into 7 equal sections. Each section contains 6 pairs of lead-scintillator plates. FHCal’s main goal is to determine geometry of ion collision by measuring the energy distribution of spectators. In order to determine the energy distribution in FHCal, modules were calibrated with cosmic muons. Another important goal facing FHCal is determination of ion collision point in MPD during first stage of MPD’s operation, when no precise ways of doing this will be available. Two methods are presented in this work: using energy distribution in FHCal and using difference in time pulses from opposite FHCal arms.
{"title":"Reconstruction of energy and collision point of heavy ions with forward hadron calorimeter at MPD setup","authors":"A. Strizhak","doi":"10.1063/5.0063348","DOIUrl":"https://doi.org/10.1063/5.0063348","url":null,"abstract":"The Forward Hadron Calorimeter (FHCal) is one of the sub-detectors of MPD/NICA (Nuclotron-based Ion Collider fAcility). FHCal consists of two arms, each containing 44 modules. Modules have longitudinal segmentation and are divided into 7 equal sections. Each section contains 6 pairs of lead-scintillator plates. FHCal’s main goal is to determine geometry of ion collision by measuring the energy distribution of spectators. In order to determine the energy distribution in FHCal, modules were calibrated with cosmic muons. Another important goal facing FHCal is determination of ion collision point in MPD during first stage of MPD’s operation, when no precise ways of doing this will be available. Two methods are presented in this work: using energy distribution in FHCal and using difference in time pulses from opposite FHCal arms.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"426 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123409824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elina Kasyanova, V. Burtsev, T. Enik, Bogdan Topko, E. Martovitsky, A. Makankin, Sergey Khabarov, O. Tarasov, A. Ivanov, N. Zamyatin, Yu.M. Kopylov
The MiniSPD test facility, its main goals and objectives are discussed in this work. The model of the stand, which was implemented in the Geant4 package, is presented. The results of simulation of cosmic ray particles depending on various parameters are discussed.
{"title":"Simulation of the MiniSPD test facility","authors":"Elina Kasyanova, V. Burtsev, T. Enik, Bogdan Topko, E. Martovitsky, A. Makankin, Sergey Khabarov, O. Tarasov, A. Ivanov, N. Zamyatin, Yu.M. Kopylov","doi":"10.1063/5.0067377","DOIUrl":"https://doi.org/10.1063/5.0067377","url":null,"abstract":"The MiniSPD test facility, its main goals and objectives are discussed in this work. The model of the stand, which was implemented in the Geant4 package, is presented. The results of simulation of cosmic ray particles depending on various parameters are discussed.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123178789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Ustinov, S. Afanasiev, V. Baskov, V. I. Bekirov, D. Dryablov, B. Dubinchik, A. L’vov, A. Malakhov, K. Michalickova, V. Polyansky, Dmitry G. Sakulin, E. Sukhov
A precision hybrid magnetic three-arm «SCAN-3» spectrometer is being developed at the Joint Institute for Nuclear Research. The spectrometer is designed to detect charged particles (π±, K±, p) and neutrons produced in the target by collisions of the NUCLOTRON high-interactive beam particles with target nuclei. One of the tasks of the spectrometer is to detect neutrons from the decay of the η-meson nucleus via nπ- and pn- channels. To complete this task, two arms of the spectrometer will be created that consist of six multilayer neutron detectors based on scintillation blocks. The characteristics of a neutron detector that consists of five scintillation blocks are considered. The detector was studied using the cosmic rays and the neutron beam produced by the stripping reaction of the NUCLOTRON extracted deuteron beam on a fixed target.
{"title":"Multilayer neutron detector based on a plastic scintillator","authors":"V. Ustinov, S. Afanasiev, V. Baskov, V. I. Bekirov, D. Dryablov, B. Dubinchik, A. L’vov, A. Malakhov, K. Michalickova, V. Polyansky, Dmitry G. Sakulin, E. Sukhov","doi":"10.1063/5.0063298","DOIUrl":"https://doi.org/10.1063/5.0063298","url":null,"abstract":"A precision hybrid magnetic three-arm «SCAN-3» spectrometer is being developed at the Joint Institute for Nuclear Research. The spectrometer is designed to detect charged particles (π±, K±, p) and neutrons produced in the target by collisions of the NUCLOTRON high-interactive beam particles with target nuclei. One of the tasks of the spectrometer is to detect neutrons from the decay of the η-meson nucleus via nπ- and pn- channels. To complete this task, two arms of the spectrometer will be created that consist of six multilayer neutron detectors based on scintillation blocks. The characteristics of a neutron detector that consists of five scintillation blocks are considered. The detector was studied using the cosmic rays and the neutron beam produced by the stripping reaction of the NUCLOTRON extracted deuteron beam on a fixed target.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132455843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Baryonic Matter at Nuclotron (BM@N) is the first experiment with a fixed target at the Nuclotron-based Ion Collider fAcility (NICA) in Dubna (Russia). Along with baryonic matter study, the BM@N physics program includes the study of Short-Range Correlations (SRC) in nuclei. The SRC measurement was carried out in 2018. We used 12C beam with the momentum of 48 GeV/c and a liquid hydrogen target. The quasi-free scattering of 12C on protons was recorded with the BM@N spectrometer, which was slightly modified for the SRC experiment. Particularly, the target proton and knocked out proton under the condition of scattering at 90 degrees in the center-of-mass coordinate system were recorded in the arm spectrometer using time-of-flight and coordinate detectors. After interaction, the residual nucleus continued moving along the beam and passed through the scintillator and coordinate detectors as well as the analyzing magnet. This contribution describes the track reconstruction in Multiwire Proportional Chambers (MWPC) and Silicon Detector systems (Si), as well as a method of obtaining combined tracks after the target using the information from MWPC and Si. This is a basis for the identification of nuclear fragments described in the first physics analysis, which was submitted for publication.
{"title":"SRC at BM@N: Reconstruction of tracks upstream and downstream from the target using the MWPC and silicon detector systems","authors":"V. Lenivenko, V. Palichik, M. Patsyuk","doi":"10.1063/5.0064078","DOIUrl":"https://doi.org/10.1063/5.0064078","url":null,"abstract":"The Baryonic Matter at Nuclotron (BM@N) is the first experiment with a fixed target at the Nuclotron-based Ion Collider fAcility (NICA) in Dubna (Russia). Along with baryonic matter study, the BM@N physics program includes the study of Short-Range Correlations (SRC) in nuclei. The SRC measurement was carried out in 2018. We used 12C beam with the momentum of 48 GeV/c and a liquid hydrogen target. The quasi-free scattering of 12C on protons was recorded with the BM@N spectrometer, which was slightly modified for the SRC experiment. Particularly, the target proton and knocked out proton under the condition of scattering at 90 degrees in the center-of-mass coordinate system were recorded in the arm spectrometer using time-of-flight and coordinate detectors. After interaction, the residual nucleus continued moving along the beam and passed through the scintillator and coordinate detectors as well as the analyzing magnet. This contribution describes the track reconstruction in Multiwire Proportional Chambers (MWPC) and Silicon Detector systems (Si), as well as a method of obtaining combined tracks after the target using the information from MWPC and Si. This is a basis for the identification of nuclear fragments described in the first physics analysis, which was submitted for publication.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115921880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Volkov, V. Ladygin, Y. Skhomenko, Y. Gurchin, A. Isupov, M. Janek, J. Karachuk, A. Khrenov, P. Kurilkin, A. Livanov, S. Piyadin, S. Reznikov, A. Terekhin, A. Tishevsky, A. Averyanov, E. V. Chernykh, D. Enache, D. O. Krivenkov, I. Vnukov
Analyzing power in elastic proton-proton scattering was obtained at the Nuclotron Internal Target Station using a polarized deuteron beam and a polyethylene target. The selection of useful events was performed using the time and amplitude information from scintillation counters. The asymmetry on hydrogen was obtained by the subtraction of the carbon background. The obtained analyzing power values are compared with the predictions of the partial-wave analysis SAID at the beam energies of 500 and 650 MeV/nucleon.
{"title":"Analyzing power in Quasi-elastic proton-proton scattering at 500 and 650 MeV/nucleon","authors":"I. Volkov, V. Ladygin, Y. Skhomenko, Y. Gurchin, A. Isupov, M. Janek, J. Karachuk, A. Khrenov, P. Kurilkin, A. Livanov, S. Piyadin, S. Reznikov, A. Terekhin, A. Tishevsky, A. Averyanov, E. V. Chernykh, D. Enache, D. O. Krivenkov, I. Vnukov","doi":"10.1063/5.0063485","DOIUrl":"https://doi.org/10.1063/5.0063485","url":null,"abstract":"Analyzing power in elastic proton-proton scattering was obtained at the Nuclotron Internal Target Station using a polarized deuteron beam and a polyethylene target. The selection of useful events was performed using the time and amplitude information from scintillation counters. The asymmetry on hydrogen was obtained by the subtraction of the carbon background. The obtained analyzing power values are compared with the predictions of the partial-wave analysis SAID at the beam energies of 500 and 650 MeV/nucleon.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121250963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Terekhin, V. Ladygin, Y. Gurchin, A. Isupov, A. Khrenov, S. Reznikov, I. Volkov, A. Tishevsky, M. Janek
The the polarimeter upgrade program at the Nuclotron internal target is presented. This polarimeter is intended for polarization experiments to study of the spin structure of two- and three-nucleon systems. The simulation of the pd-elastic and pp-elastic scattering for 500 - 1000 MeV proton energy to optimize the experimental setup and the first test of new detectors are performed.
{"title":"New proton polarimeter at the Nuclotron","authors":"A. Terekhin, V. Ladygin, Y. Gurchin, A. Isupov, A. Khrenov, S. Reznikov, I. Volkov, A. Tishevsky, M. Janek","doi":"10.1063/5.0068724","DOIUrl":"https://doi.org/10.1063/5.0068724","url":null,"abstract":"The the polarimeter upgrade program at the Nuclotron internal target is presented. This polarimeter is intended for polarization experiments to study of the spin structure of two- and three-nucleon systems. The simulation of the pd-elastic and pp-elastic scattering for 500 - 1000 MeV proton energy to optimize the experimental setup and the first test of new detectors are performed.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121536928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Learning and associative memory are understood as emergent phenomena resulting from interactions between a complex network of neurons. It is well known that the structure of such a neural network heavily influences its function. Biological networks (e.g. neuronal network of the worm Caenorhabditis elegans) have been shown to exhibit small-world characteristics. To investigate the structure-function relationship in small-world networks, we simulate the Hopfield model of associative memory on a regular and Watts-Strogatz network. We obtain estimates of memory capacity on a regular and a WS network through numerical simulations. Further, we study how changing the probability of rewiring and local connectivity in a WS network affects the performance of associative memory. We find that the performance on small-world networks is as robust as that on random networks despite using only a fraction of connections, making the former biologically favorable. Our simulations are in agreement with experimental evidence found in the existing literature on small-world characteristics in biological networks and give deeper insights into this phenomenon.
{"title":"Associative memory on small-world networks","authors":"Yash Gurbani, S. Kamil, Santosh Kumar","doi":"10.1063/5.0063386","DOIUrl":"https://doi.org/10.1063/5.0063386","url":null,"abstract":"Learning and associative memory are understood as emergent phenomena resulting from interactions between a complex network of neurons. It is well known that the structure of such a neural network heavily influences its function. Biological networks (e.g. neuronal network of the worm Caenorhabditis elegans) have been shown to exhibit small-world characteristics. To investigate the structure-function relationship in small-world networks, we simulate the Hopfield model of associative memory on a regular and Watts-Strogatz network. We obtain estimates of memory capacity on a regular and a WS network through numerical simulations. Further, we study how changing the probability of rewiring and local connectivity in a WS network affects the performance of associative memory. We find that the performance on small-world networks is as robust as that on random networks despite using only a fraction of connections, making the former biologically favorable. Our simulations are in agreement with experimental evidence found in the existing literature on small-world characteristics in biological networks and give deeper insights into this phenomenon.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129393149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. B. Luong, D. Idrisov, P. Parfenov, A. Taranenko, A. Demanov
The goal of the Multi-Purpose Detector (MPD) experiment at NICA collider is to explore the QCD phase diagram of strongly interacting matter produced in nucleus-nucleus collisions at SNN=4−11 Gev. The performance of MPD detector for elliptic flow measurements of charged hadrons is studied with Monte-Carlo simulations using collisions of Au+Au ions employing UrQMD, SMASH, and AMPT heavy-ion event generators. Different methods for flow measurements: event plane and direct cumulants are used to investigate the contribution of non-flow correlations and flow fluctuations.
{"title":"Comparison of methods for elliptic flow measurements at NICA energies SNN=4−11 Gev","authors":"V. B. Luong, D. Idrisov, P. Parfenov, A. Taranenko, A. Demanov","doi":"10.1063/5.0063369","DOIUrl":"https://doi.org/10.1063/5.0063369","url":null,"abstract":"The goal of the Multi-Purpose Detector (MPD) experiment at NICA collider is to explore the QCD phase diagram of strongly interacting matter produced in nucleus-nucleus collisions at SNN=4−11 Gev. The performance of MPD detector for elliptic flow measurements of charged hadrons is studied with Monte-Carlo simulations using collisions of Au+Au ions employing UrQMD, SMASH, and AMPT heavy-ion event generators. Different methods for flow measurements: event plane and direct cumulants are used to investigate the contribution of non-flow correlations and flow fluctuations.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116593732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Soni, A. Issadykov, A. Gadaria, J. Patel, J. Pandya
We present the branching fractions for the rare semileptonic decay B→ωl+l− for l=e,μ,τ. The necessary transition form factors are computed in the entire range of momentum transfer within the Standard Model framework of Covariant Confined Quark Model with built-in infra-red confinement. We further compute different physical observables such as forward backward asymmetry, longitudinal and transverse polarization along with other angular observables.
{"title":"Weak rare decays for B → ω transitions within covariant confined quark model framework","authors":"N. Soni, A. Issadykov, A. Gadaria, J. Patel, J. Pandya","doi":"10.1063/5.0063329","DOIUrl":"https://doi.org/10.1063/5.0063329","url":null,"abstract":"We present the branching fractions for the rare semileptonic decay B→ωl+l− for l=e,μ,τ. The necessary transition form factors are computed in the entire range of momentum transfer within the Standard Model framework of Covariant Confined Quark Model with built-in infra-red confinement. We further compute different physical observables such as forward backward asymmetry, longitudinal and transverse polarization along with other angular observables.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122211463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper we report a calculation of branching ratios for nonleptonic decays of Bc meson in the framework of the covariant confined quark model. We compared the obtained results with available experimental data and other theoretical approaches.
{"title":"Nonleptonic decays of Bc meson","authors":"A. Issadykov, Z. Tyulemissov, K. Nurlan","doi":"10.1063/5.0063296","DOIUrl":"https://doi.org/10.1063/5.0063296","url":null,"abstract":"In this paper we report a calculation of branching ratios for nonleptonic decays of Bc meson in the framework of the covariant confined quark model. We compared the obtained results with available experimental data and other theoretical approaches.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124025470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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