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Masses of Light Quarks 轻夸克的质量
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700345
A. A. Osipov
{"title":"Masses of Light Quarks","authors":"A. A. Osipov","doi":"10.1134/S1063779624700345","DOIUrl":"10.1134/S1063779624700345","url":null,"abstract":"<p>Based on the general form of the first correction to the result of current algebra for the masses of pseudoscalar mesons, we obtain a number of sum rules relating the masses of pseudoscalars to the light quark mass ratios <span>({{{{m}_{u}}} mathord{left/ {vphantom {{{{m}_{u}}} {{{m}_{d}}}}} right. kern-0em} {{{m}_{d}}}})</span>, <span>({{{{m}_{s}}} mathord{left/ {vphantom {{{{m}_{s}}} {{{m}_{d}}}}} right. kern-0em} {{{m}_{d}}}})</span>. A more careful consideration involving experimental data on <span>(eta to 3pi )</span> decays allows us to identify a domain in which the results of these sum rules do not contradict each other. This determines the range of acceptable values for the ratios <span>({{{{{{m}_{u}}} mathord{left/ {vphantom {{{{m}_{u}}} {{{m}_{d}}}}} right. kern-0em} {{{m}_{d}}}}} mathord{left/ {vphantom {{{{{{m}_{u}}} mathord{left/ {vphantom {{{{m}_{u}}} {{{m}_{d}}}}} right. kern-0em} {{{m}_{d}}}}} {{{m}_{s}}}}} right. kern-0em} {{{m}_{s}}}})</span>. Finally, the results are compared with known phenomenological data and calculation results on a lattice.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"847 - 852"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identical Pion Interferometry from Au + Au Collisions at (sqrt {{{s}_{{NN}}}} ) = 3, 3.2, 3.5, and 3.9 GeV in the STAR Experiment at RHIC 在RHIC的STAR实验中，在(sqrt {{{s}_{{NN}}}} ) = 3、3.2、3.5和3.9 GeV的金+金对撞中产生的相同小离子干涉测量法
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700278
V. B. Luong
{"title":"Identical Pion Interferometry from Au + Au Collisions at (sqrt {{{s}_{{NN}}}} ) = 3, 3.2, 3.5, and 3.9 GeV in the STAR Experiment at RHIC","authors":"V. B. Luong","doi":"10.1134/S1063779624700278","DOIUrl":"10.1134/S1063779624700278","url":null,"abstract":"<p>Two-pion interferometry provides access to the spatial and temporal size, shape, and evolution of the sources created in heavy ion collisions, offering strong constraints for theoretical models. In these proceedings, we will report the measurement of correlation strength (<span>(lambda )</span>) and femtoscopic radii (<span>({{R}_{{{text{out}}}}})</span>, <span>({{R}_{{{text{side}}}}})</span>, <span>({{R}_{{{text{long}}}}})</span>, <span>(R_{{{text{out}} - {text{long}}}}^{2})</span>) extracted from the two-pion correlation function in Au + Au collisions at <span>(sqrt {{{s}_{{NN}}}} )</span> = 3, 3.2, 3.5, and 3.9 GeV. The dependences of these parameters on pair transverse momentum, pair rapidity, collision centrality, and collision energy will be presented, and their physics implications will be discussed.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"822 - 826"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Beam Collision Monitoring and Luminosity Measurements at the Interaction Point at MPD/NICA MPD/NICA 交汇点的光束碰撞监测和光度测量
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700515
S. P. Avdeev, S. G. Busin, M. G. Buryakov, V. M. Golovatyuk, A. I. Malakhov, G. D. Milnov, A. B. Kurepin, A. G. Litvinenko, E. I. Litvinenko, B. Otgongerel, M. Sovd
{"title":"Beam Collision Monitoring and Luminosity Measurements at the Interaction Point at MPD/NICA","authors":"S. P. Avdeev,&nbsp;S. G. Busin,&nbsp;M. G. Buryakov,&nbsp;V. M. Golovatyuk,&nbsp;A. I. Malakhov,&nbsp;G. D. Milnov,&nbsp;A. B. Kurepin,&nbsp;A. G. Litvinenko,&nbsp;E. I. Litvinenko,&nbsp;B. Otgongerel,&nbsp;M. Sovd","doi":"10.1134/S1063779624700515","DOIUrl":"10.1134/S1063779624700515","url":null,"abstract":"<p>The detector for tuning the beam convergence at the interaction point of the MPD (Multi-Purpose Detector) experiment at the NICA collider (Nuclotron-based Ion Collider fAcility) is discussed. The calibration procedure of the luminosity detector for determination of the absolute luminosity in the MPD interaction zone is presented.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"900 - 903"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Description of Charged Particle Dependence on Transverse Momentum with Tsallis-Like Distribution 描述带电粒子对具有类似查利斯分布的横动量的依赖性
IF 0.4 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/s1063779624700357
E. V. Nedorezov, A. S. Parvan, A. A. Aparin
{"title":"Description of Charged Particle Dependence on Transverse Momentum with Tsallis-Like Distribution","authors":"E. V. Nedorezov, A. S. Parvan, A. A. Aparin","doi":"10.1134/s1063779624700357","DOIUrl":"https://doi.org/10.1134/s1063779624700357","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Recently, a large amount of experimental data has been collected in high energy physics for studying the properties of matter formed in ultrarelativistic heavy-ion collisions. The main interest is to study the phase diagram and localize phase transitions. In this work we measured the thermodynamic properties of the system produced in such collisions. These parameters were obtained from the transverse momentum distributions of final particles based on several theoretical models. We used well-known hydrodynamic Blast-Wave approach based on Boltzmann statistics. Further, we used a new approach based on q-dual statistics, which can provide more information about the system, in particular its chemical potential and measure the difference of the produced system from the classical equilibrium. We observe that the kinetic freeze-out parameters depend on collision centrality and energy. Results obtained for Blast-Wave model are in agreement with previously published results. For q-dual statistics we can see that in peripheral collisions the system is less equilibrated leading to an increased deviation from the classical distribution.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"11 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Material Selection of the SPD Beam-Beam Counter Scintillation Detector Prototype SPD 光束-光束计数器闪烁探测器原型的材料选择
IF 0.4 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/s106377962470076x
A. M. Zakharov, F. A. Dubinin, A. Yu. Isupov, V. P. Ladygin, A. D. Manakonov, G. A. Nigmatkulov, S. G. Reznikov, P. E. Teterin, A. V. Tishevsky, I. S. Volkov, A. O. Zhurkina
{"title":"Material Selection of the SPD Beam-Beam Counter Scintillation Detector Prototype","authors":"A. M. Zakharov, F. A. Dubinin, A. Yu. Isupov, V. P. Ladygin, A. D. Manakonov, G. A. Nigmatkulov, S. G. Reznikov, P. E. Teterin, A. V. Tishevsky, I. S. Volkov, A. O. Zhurkina","doi":"10.1134/s106377962470076x","DOIUrl":"https://doi.org/10.1134/s106377962470076x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The Spin Physics Detector is an experiment at NICA designed to study the spin structure of the proton and deuteron and the other spin-related phenomena using polarized beams. Two endcap detector wheels of scintillator-based Beam-Beam Counters (BBCs) will be installed symmetrically aside from the interaction point and will serve as a tool for beam diagnostics including local polarimetry. The selection of material combinations for BBC is presented using scintillation tiles with different material combinations of the BBC prototype. The influence of the light collection was studied using matted and covered with Tyvek tiles. Different fibers (Saint-Gobain Crystals BCF91AS, BCF92S, and Kuraray Y-11), as well as different optical cements (CKTN type E, OK-72) were used. The prototypes were tested with cosmic rays and radioactive source using SensL SiPM readout.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"46 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Reconstruction Efficiency of Λ and (K_{{text{S}}}^{0}) for the BM@N Experiment Using Monte Carlo Generated Events 利用蒙特卡洛事件分析 BM@N 实验的Λ 和 （K_{text{S}}}^{0}）重建效率
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700266
R. Barak, S. Merts
{"title":"Analysis of Reconstruction Efficiency of Λ and (K_{{text{S}}}^{0}) for the BM@N Experiment Using Monte Carlo Generated Events","authors":"R. Barak,&nbsp;S. Merts","doi":"10.1134/S1063779624700266","DOIUrl":"10.1134/S1063779624700266","url":null,"abstract":"<p>This work is devoted to the search for lambda hyperons and short-lived neutral kaons after collisions in the Baryonic Matter at Nuclotron (BM@N) experiment, implemented at the Joint Institute for Nuclear Research (JINR, Dubna). To analyze the effectiveness of strange particle reconstruction algorithms, Monte Carlo simulations of the collision of a 3.9 AGeV Xe beam with a CsI target were used. After reconstruction of events and selection of candidate pairs, distributions of invariant masses were obtained and peaks corresponding to lambda hyperons and neutral kaons were identified. The dependence of the reconstruction efficiency of strange particles on rapidity and transverse momentum was derived.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"817 - 821"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Azimuthal Two-Particle Correlations as a Probe of Colour String Fusion in p + p Collisions 作为 p + p 碰撞中色弦聚变探测器的方位双粒子相关性
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700424
D. Prokhorova, E. Andronov
{"title":"Azimuthal Two-Particle Correlations as a Probe of Colour String Fusion in p + p Collisions","authors":"D. Prokhorova,&nbsp;E. Andronov","doi":"10.1134/S1063779624700424","DOIUrl":"10.1134/S1063779624700424","url":null,"abstract":"<p>In this paper, we explore the potential of the colour string model with fusion to describe the azimuthal correlations in proton-proton collisions at <span>(sqrt s = 13)</span> TeV. Our approach is based on a detailed simulation of the longitudinal and transverse dynamics of strings leading to their subsequent fusion and decay. The azimuthal anisotropy appears due to a momentum loss that particles exhibit once they pass through the non-uniform strings’ density. We calculate two-particle correlation function <span>(C(Delta eta ,Delta phi ))</span>, corresponding <span>({{c}_{2}}{ 2} )</span> cumulant and <span>({{v}_{2}}{ 2} )</span> Fourier harmonic by two methods. Results reveal an event multiplicity dependency of these observables, while multi-particle correlations are not induced by the string fusion mechanism.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"874 - 878"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of e+e– Annihilation into Hadrons with SND at VEPP-2000 在 VEPP-2000 上利用 SND 对 e+e- Annihilation into Hadrons 进行的研究
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/S1063779624700035
V. P. Druzhinin, M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, L. V. Kardapoltsev, A. G. Kharlamov, A. A. Korol, D. P. Kovrizhin, A. P. Krukov, A. S. Kupich, N. A. Melnikova, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, S. I. Serednyakov, D. A. Shtol, Z. K. Silagadze, I. K. Surin, Yu. V. Usov, V. N. Zabin
{"title":"Study of e+e– Annihilation into Hadrons with SND at VEPP-2000","authors":"V. P. Druzhinin,&nbsp;M. N. Achasov,&nbsp;A. Yu. Barnyakov,&nbsp;K. I. Beloborodov,&nbsp;A. V. Berdyugin,&nbsp;A. G. Bogdanchikov,&nbsp;A. A. Botov,&nbsp;T. V. Dimova,&nbsp;L. V. Kardapoltsev,&nbsp;A. G. Kharlamov,&nbsp;A. A. Korol,&nbsp;D. P. Kovrizhin,&nbsp;A. P. Krukov,&nbsp;A. S. Kupich,&nbsp;N. A. Melnikova,&nbsp;A. E. Obrazovsky,&nbsp;E. V. Pakhtusova,&nbsp;K. V. Pugachev,&nbsp;S. I. Serednyakov,&nbsp;D. A. Shtol,&nbsp;Z. K. Silagadze,&nbsp;I. K. Surin,&nbsp;Yu. V. Usov,&nbsp;V. N. Zabin","doi":"10.1134/S1063779624700035","DOIUrl":"10.1134/S1063779624700035","url":null,"abstract":"<p>Recent results on a study of exclusive processes of annihilation into hadrons with the SND detector at the VEPP-2000 collider at center-of-mass energies below 2 GeV are presented. In particular, we discuss new data on the processes <span>({{e}^{ + }}{{e}^{ - }} to nbar {n})</span>, <span>(pbar {p})</span>, <span>(eta gamma )</span>, <span>(omega {{pi }^{0}})</span>, <span>({{pi }^{ + }}{{pi }^{ - }}{{pi }^{0}})</span>, and <span>({{pi }^{ + }}{{pi }^{ - }}{{pi }^{0}}{{pi }^{0}}eta )</span>.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"699 - 704"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wide-Gap Resistive Plate Chamber for the Trigger System of the TOF MPD Test Bench 用于 TOF MPD 测试台触发系统的宽间隙电阻板室
IF 0.4 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/s1063779624700540
S. Sokolova, V. Babkin, A. Dmitriev, P. Dulov, M. Rumyantsev
{"title":"Wide-Gap Resistive Plate Chamber for the Trigger System of the TOF MPD Test Bench","authors":"S. Sokolova, V. Babkin, A. Dmitriev, P. Dulov, M. Rumyantsev","doi":"10.1134/s1063779624700540","DOIUrl":"https://doi.org/10.1134/s1063779624700540","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new wide-gap resistive plate chamber (RPC) detector has been developed to upgrade cosmic ray test setup in the production area of Time-of-Flight system (TOF) for the Multipurpose detector (MPD) at NICA collider. The design of the wide-gap RPC and main performance parameters are presented.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"28 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Drift Chambers for the ALPOM-2 Experiment 用于 ALPOM-2 试验的新漂移室
IF 0.4 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/s1063779624700758
A. A. Druzhinin, N. M. Piskunov, R. A. Shindin, Yu. T. Kiryushin, D. A. Kirillov, N. V. Kostiaeva, E. P. Makoveev, A. E. Baskakov
{"title":"New Drift Chambers for the ALPOM-2 Experiment","authors":"A. A. Druzhinin, N. M. Piskunov, R. A. Shindin, Yu. T. Kiryushin, D. A. Kirillov, N. V. Kostiaeva, E. P. Makoveev, A. E. Baskakov","doi":"10.1134/s1063779624700758","DOIUrl":"https://doi.org/10.1134/s1063779624700758","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work describes new drift chambers for the ALPOM-2 experiment. This gaseous detector consists of signal and drift-forming as well as screening planes. The main advantages of new chambers that provide effective registration of particles are considered. Details of a chamber design and test bench are presented. Methods of testing and the results obtained are described, confirming the high efficiency and resolution of this detector, which is important for further precision experiments in spin physics at the ALPOM-2 setup and the NICA collider.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"20 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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