B. Kondratiev, Andrey G. Antonov, V. Borisov, Halmet G. Khodzhibagiyan, S. Kostromin
Serial production of superconducting (SC) magnets for the Nuclotron Ion-based fAcility (NICA) and Facility for Antiproton and Ion Research (FAIR) projects is currently underway at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia [1]. SC-coil electrical parameters should be checked before each stage of assembling and cryogenic testing to avoid faults, such as inter-turn short circuit and insulation failure. A system for checking of SC-magnets electrical parameters is described in this paper. The results obtained by this system are presented and outlined.
{"title":"System for checking of electrical parameters of superconducting magnets for the NICA and FAIR projects","authors":"B. Kondratiev, Andrey G. Antonov, V. Borisov, Halmet G. Khodzhibagiyan, S. Kostromin","doi":"10.1063/5.0063712","DOIUrl":"https://doi.org/10.1063/5.0063712","url":null,"abstract":"Serial production of superconducting (SC) magnets for the Nuclotron Ion-based fAcility (NICA) and Facility for Antiproton and Ion Research (FAIR) projects is currently underway at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia [1]. SC-coil electrical parameters should be checked before each stage of assembling and cryogenic testing to avoid faults, such as inter-turn short circuit and insulation failure. A system for checking of SC-magnets electrical parameters is described in this paper. The results obtained by this system are presented and outlined.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"1 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":"131343814","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}
We present a study of ω(782) and φ (1020) mesons mixing in the framework of the chiral Nambu–Jona-Lasinio model. The decay φ → π0γ is considered as a basic process to determine mixing angle. The width of the decay φ → 3π and the cross-section of the process e+e− → π0φ are calculated in the satisfactory agreement with experimental data. A predictions for semileptonic decays φ → π0[e+e−, μ+μ−] are given.
{"title":"The ω – φ mixing and processes φ → π0[π+π−, l+l−], e+e− → φπ","authors":"M. Volkov, K. Nurlan, A. Pivovarov","doi":"10.1063/5.0063409","DOIUrl":"https://doi.org/10.1063/5.0063409","url":null,"abstract":"We present a study of ω(782) and φ (1020) mesons mixing in the framework of the chiral Nambu–Jona-Lasinio model. The decay φ → π0γ is considered as a basic process to determine mixing angle. The width of the decay φ → 3π and the cross-section of the process e+e− → π0φ are calculated in the satisfactory agreement with experimental data. A predictions for semileptonic decays φ → π0[e+e−, μ+μ−] are given.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"77 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":"131335093","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. Azhibekov, Y. Penionzhkevich, M. Naumenko, S. Lukyanov, T. Issatayev, V. A. Maslov, K. Mendibayev, A. Kabyshev, Alexei V. Shakhov, K. Kuterbekov, A. Mukhambetzhan
This paper presents the theoretical analysis of neutron transfer mechanism for the reaction 181Ta(18O, 19O) at energies 81.86 and 90.05 MeV in the center of mass system. Numerical solution of the time-dependent Schrodinger equation is used for studying neutron transfer processes. The evolution of the wave function for the neutron from the uppermost occupied single-particle neutron level of the 181Ta nucleus is determined. The dynamics of neutron transfer process is described and the probabilities of occupation of initially unoccupied single-particle neutron levels of the 18O nucleus are determined.
{"title":"Probabilities of neutron transfer to single-particle levels in the reaction 181Ta(18O, 19O) at near-barrier energies","authors":"A. Azhibekov, Y. Penionzhkevich, M. Naumenko, S. Lukyanov, T. Issatayev, V. A. Maslov, K. Mendibayev, A. Kabyshev, Alexei V. Shakhov, K. Kuterbekov, A. Mukhambetzhan","doi":"10.1063/5.0063346","DOIUrl":"https://doi.org/10.1063/5.0063346","url":null,"abstract":"This paper presents the theoretical analysis of neutron transfer mechanism for the reaction 181Ta(18O, 19O) at energies 81.86 and 90.05 MeV in the center of mass system. Numerical solution of the time-dependent Schrodinger equation is used for studying neutron transfer processes. The evolution of the wave function for the neutron from the uppermost occupied single-particle neutron level of the 181Ta nucleus is determined. The dynamics of neutron transfer process is described and the probabilities of occupation of initially unoccupied single-particle neutron levels of the 18O nucleus are determined.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"31 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":"116868284","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 report describes all the web services that compose information service ecosystem of the BM@N experiment and details of their implementation. The following integrated services are presented, such as a Single Authorization and Group Security Policy service, system for storing structured information on the experiment, online Electronic Logbook system, collaboration forum, service for visualization hardware parameters of the slow control system, user interface for the offline database of the experiment and job definition service for distributed data processing. The main entry point for collaboration members is the official BM@N website, from which access to all the implemented information services is obtained.
{"title":"Ecosystem of information services for the BM@N experiment","authors":"I. Slepov, A. Chebotov, K. Gertsenberger","doi":"10.1063/5.0063375","DOIUrl":"https://doi.org/10.1063/5.0063375","url":null,"abstract":"The report describes all the web services that compose information service ecosystem of the BM@N experiment and details of their implementation. The following integrated services are presented, such as a Single Authorization and Group Security Policy service, system for storing structured information on the experiment, online Electronic Logbook system, collaboration forum, service for visualization hardware parameters of the slow control system, user interface for the offline database of the experiment and job definition service for distributed data processing. The main entry point for collaboration members is the official BM@N website, from which access to all the implemented information services is obtained.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"9 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":"125436929","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 Spin Physics Detector (SPD) is a planned set-up for spin physics research at one of the two interaction points at the Nuclotron-based Ion Collider fAcility (NICA) that is under construction at the Joint Institute for Nuclear Research. Effective studying of the nucleon spin structure in colliding polarized proton beams is possible with the pp collision luminosity L = = 1x1032cm−2s−1 at the energy range of Ecm = 27 GeV. Reaching of necessary level of the luminosity is connected with the accumulation n ~2x1013 particles in each of the collider rings and solving the problems of stable beam dynamics. Building of the collider ring impedance model is necessary step for determining at the design stage possible limitations on the stored beam intensity, and reducing the influence of the impedance effect on the beam dynamics.
{"title":"Impedance model of the NICA collider for experiments at SPD","authors":"M. Korobitsina, A. Kovalenko, A. Kolomiets","doi":"10.1063/5.0063997","DOIUrl":"https://doi.org/10.1063/5.0063997","url":null,"abstract":"The Spin Physics Detector (SPD) is a planned set-up for spin physics research at one of the two interaction points at the Nuclotron-based Ion Collider fAcility (NICA) that is under construction at the Joint Institute for Nuclear Research. Effective studying of the nucleon spin structure in colliding polarized proton beams is possible with the pp collision luminosity L = = 1x1032cm−2s−1 at the energy range of Ecm = 27 GeV. Reaching of necessary level of the luminosity is connected with the accumulation n ~2x1013 particles in each of the collider rings and solving the problems of stable beam dynamics. Building of the collider ring impedance model is necessary step for determining at the design stage possible limitations on the stored beam intensity, and reducing the influence of the impedance effect on the beam dynamics.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"79 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":"123406275","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}
We analyze the possibility to discover the production of a Higgs boson in association with a single top quark at the LHC. Such process is strongly suppressed in the Standard Model. An observation of this production mode would be an unambiguous indication of the New Physics providing an important insight on the nature of the Higgs mechanism. The production is sensitive to the relative sign of the coupling parameters describing Higgs interaction with fermions and gauge bosons. Our analysis considers single top quark production via t-channel using Higgs boson decays to a bottom quark-antiquark pair and semileptonic top quark decays. We present a Monte-Carlo study of the pp → Hbq process and discuss the experimental signatures that can help to discover it at the LHC. Two scenarios have been considered, the Standard Model case and the Inverted Top Coupling scenario.
{"title":"Monte-Carlo study of Higgs boson production in association with a single top quark at 13 TeV","authors":"O. Koval, I. Boyko, N. Huseynov","doi":"10.1063/5.0064116","DOIUrl":"https://doi.org/10.1063/5.0064116","url":null,"abstract":"We analyze the possibility to discover the production of a Higgs boson in association with a single top quark at the LHC. Such process is strongly suppressed in the Standard Model. An observation of this production mode would be an unambiguous indication of the New Physics providing an important insight on the nature of the Higgs mechanism. The production is sensitive to the relative sign of the coupling parameters describing Higgs interaction with fermions and gauge bosons. Our analysis considers single top quark production via t-channel using Higgs boson decays to a bottom quark-antiquark pair and semileptonic top quark decays. We present a Monte-Carlo study of the pp → Hbq process and discuss the experimental signatures that can help to discover it at the LHC. Two scenarios have been considered, the Standard Model case and the Inverted Top Coupling scenario.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"6 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":"115297884","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 talk we are going to discuss recent results on non-Abelian vortex strings in four-dimensional (4D) N = 2 supersymmetric QCD with U(N = 2) gauge group and Nf = 4 flavors of quark hypermultiplets. It has been recently shown that these vortices behave as critical superstrings. In particular, the lowest string state appears to be a massless BPS “baryon.” Here we confirm the existence of this stringy baryon using purely field-theoretic methods. To this end we study the conformal world-sheet theory on the non-Abelian string – the so called weighted N = (2, 2) supersymmetric CP model. Then we use the 2D-4D correspondence to show that a marginal deformation of the target space is associated with the emergence of a non-perturbative Higgs branch in 4D theory which opens up at strong coupling. The modulus parameter on this Higgs branch is the vacuum expectation value of the massless BPS “baryon” previously found in string theory. Moreover, we explicitly demonstrate the occurrence of the so-called “instead-of-confinement” phase. Based on the talk given at the XXIV International Scientific Conference of Young Scientists and Specialists (AYSS-2020).
在这次演讲中，我们将讨论具有U(N = 2)规范群和Nf = 4口味的夸克超多重态的四维(4D) N = 2超对称QCD中关于非阿贝尔涡旋弦的最新结果。最近的研究表明，这些涡旋表现为临界超弦。特别是，最低的弦态似乎是一个无质量的BPS“重子”。本文用纯场论方法证实了这种弦重子的存在。为此，我们研究了非阿贝尔弦上的共形世界表理论——加权N =(2,2)超对称CP模型。然后，我们使用二维-四维对应来证明目标空间的边缘变形与四维理论中非摄动希格斯分支的出现有关，该分支在强耦合下打开。这个希格斯分支上的模量参数是先前在弦理论中发现的无质量BPS“重子”的真空期望值。此外，我们明确地证明了所谓的“非约束”阶段的发生。基于在第24届国际青年科学家和专家科学会议(AYSS-2020)上的演讲。
{"title":"Stringy effects in four-dimensional N = 2 supersymmetric QCD from 2D-4D correspondence","authors":"E. Ievlev, M. Shifman, A. Yung","doi":"10.1063/5.0063360","DOIUrl":"https://doi.org/10.1063/5.0063360","url":null,"abstract":"In this talk we are going to discuss recent results on non-Abelian vortex strings in four-dimensional (4D) N = 2 supersymmetric QCD with U(N = 2) gauge group and Nf = 4 flavors of quark hypermultiplets. It has been recently shown that these vortices behave as critical superstrings. In particular, the lowest string state appears to be a massless BPS “baryon.” Here we confirm the existence of this stringy baryon using purely field-theoretic methods. To this end we study the conformal world-sheet theory on the non-Abelian string – the so called weighted N = (2, 2) supersymmetric CP model. Then we use the 2D-4D correspondence to show that a marginal deformation of the target space is associated with the emergence of a non-perturbative Higgs branch in 4D theory which opens up at strong coupling. The modulus parameter on this Higgs branch is the vacuum expectation value of the massless BPS “baryon” previously found in string theory. Moreover, we explicitly demonstrate the occurrence of the so-called “instead-of-confinement” phase. Based on the talk given at the XXIV International Scientific Conference of Young Scientists and Specialists (AYSS-2020).","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"145 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":"116615713","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}
Azimuthal anisotropy of produced particles is one of the important observables sensitive to the transport properties of the strongly interacting matter created in relativistic heavy-ion collisions. In this work, we report on the calculations of elliptic flow (v2) of identified charged hadrons produced in Au+Au collisions at sNN=4.5−200 Gev from a viscous hydro+cascade hybrid model vHLLE+UrQMD and provide the direct comparison with published results from STAR and PHENIX experiments. The results would be useful as predictions for the upcoming beam energy scan experiments at NICA Collider.
{"title":"Evolution of elliptic flow of produced particles from Au+Au collisions at sNN=4.5−200 Gev in a hybrid model","authors":"A. Demanov, P. Parfenov, A. Taranenko","doi":"10.1063/5.0067505","DOIUrl":"https://doi.org/10.1063/5.0067505","url":null,"abstract":"Azimuthal anisotropy of produced particles is one of the important observables sensitive to the transport properties of the strongly interacting matter created in relativistic heavy-ion collisions. In this work, we report on the calculations of elliptic flow (v2) of identified charged hadrons produced in Au+Au collisions at sNN=4.5−200 Gev from a viscous hydro+cascade hybrid model vHLLE+UrQMD and provide the direct comparison with published results from STAR and PHENIX experiments. The results would be useful as predictions for the upcoming beam energy scan experiments at NICA Collider.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":" 34","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113950877","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 gauge model SU (2)L × U (1) with extension of the lepton sector by right sterile Majorana neutrinos is considered. A block diagonalization of the total mass matrix 6 × 6 of light (active) and sterile neutrinos is performed for the general form of the mixing matrix in the sterile neutrino sector. Production rates and distributions for pTN and yN for processes pp → Nl± and pp → NV were studied including gluon fusion gg → h*/Z* → NV at s=13 Tev LHC energy.
{"title":"Heavy Neutrino signals in models with extended lepton sector","authors":"T. Nikolaeva","doi":"10.1063/5.0063394","DOIUrl":"https://doi.org/10.1063/5.0063394","url":null,"abstract":"The gauge model SU (2)L × U (1) with extension of the lepton sector by right sterile Majorana neutrinos is considered. A block diagonalization of the total mass matrix 6 × 6 of light (active) and sterile neutrinos is performed for the general form of the mixing matrix in the sterile neutrino sector. Production rates and distributions for pTN and yN for processes pp → Nl± and pp → NV were studied including gluon fusion gg → h*/Z* → NV at s=13 Tev LHC energy.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"359 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":"134375710","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}
Elena V. Vladimirova, M. Simonov, Tatiana Yu. Tretyakova
Evaluations of nuclear binding energies are obtained, and proton and neutron drip lines are localized using method of local mass relations. The formula describing the residual neutron-proton interaction is approximated and used to obtain estimates. Results based on several compilations of experimental data are obtained to confirm the robustness of the method. In addition, results for binding energies of superheavy nuclei are obtained by machine learning method based on support vector regression. Binding energies of several neighbouring nuclei are used as input parameters. Comparison with other works estimates shows reliable accuracy of the results.
{"title":"Phenomenological methods for nuclear mass evaluation at the limits of the nuclear chart","authors":"Elena V. Vladimirova, M. Simonov, Tatiana Yu. Tretyakova","doi":"10.1063/5.0063340","DOIUrl":"https://doi.org/10.1063/5.0063340","url":null,"abstract":"Evaluations of nuclear binding energies are obtained, and proton and neutron drip lines are localized using method of local mass relations. The formula describing the residual neutron-proton interaction is approximated and used to obtain estimates. Results based on several compilations of experimental data are obtained to confirm the robustness of the method. In addition, results for binding energies of superheavy nuclei are obtained by machine learning method based on support vector regression. Binding energies of several neighbouring nuclei are used as input parameters. Comparison with other works estimates shows reliable accuracy of the results.","PeriodicalId":296008,"journal":{"name":"PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)","volume":"86 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":"126142743","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：