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Neutron Reconstruction in the BM@N Experiment Using Machine Learning 利用机器学习在 BM@N 实验中重建中子
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/s1063779624700400
V. Bocharnikov, D. Derkach, M. Golubeva, F. Guber, S. Morozov, P. Parfenov, F. Ratnikov
{"title":"Neutron Reconstruction in the BM@N Experiment Using Machine Learning","authors":"V. Bocharnikov, D. Derkach, M. Golubeva, F. Guber, S. Morozov, P. Parfenov, F. Ratnikov","doi":"10.1134/s1063779624700400","DOIUrl":"https://doi.org/10.1134/s1063779624700400","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>At present, new compact highly granular neutron detector is being developed for the BM@N experiment. This detector will be used to identify neutrons, to measure their energies using time-of-flight method, neutron yields and azimuthal flow of neutrons in heavy-ion collisions at beam energies up to 4 <i>A</i> GeV. Application of machine learning techniques and preliminary results of neutron identification and energy reconstruction are discussed. First predictions of the anisotropic flow of neutrons using the DCM-QGSM-SMM model of heavy-ion collisions are shown.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"47 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202370","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
Prevalence of Production of Twisted Particles in Heavy-Ion Collisions 重离子碰撞中产生扭曲粒子的普遍性
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/s1063779624700734
A. J. Silenko, P. Zhang, L. Zou
{"title":"Prevalence of Production of Twisted Particles in Heavy-Ion Collisions","authors":"A. J. Silenko, P. Zhang, L. Zou","doi":"10.1134/s1063779624700734","DOIUrl":"https://doi.org/10.1134/s1063779624700734","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Particles produced in noncentral heavy-ion collisions are mostly twisted (vortex). They are created in electromagnetic and strong interactions. Particles emitted in strong interactions are twisted if initial interacting partons are in twisted states and are untwisted in the opposite case. A vorticity of nuclear matter plays an important role for the production of twisted particles.</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":"142202413","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
Cumulative Proton Production in p + C Interactions at 4.2 and 10 GeV/c and the Uncertainty Principle 4.2 和 10 GeV/c 下 p + C 粒子相互作用中的累积质子生成量与不确定性原理
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/s1063779624700783
Ts. Baatar, A. I. Malakhov, N. Khishigbuyan, B. Otgongerel, M. Sovd, G. Sharkhuu, R. Togoo, M. Urangua
{"title":"Cumulative Proton Production in p + C Interactions at 4.2 and 10 GeV/c and the Uncertainty Principle","authors":"Ts. Baatar, A. I. Malakhov, N. Khishigbuyan, B. Otgongerel, M. Sovd, G. Sharkhuu, R. Togoo, M. Urangua","doi":"10.1134/s1063779624700783","DOIUrl":"https://doi.org/10.1134/s1063779624700783","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this paper we study the cumulative proton production in <span>(p + C)</span> interactions at <span>(4.2)</span> and 10 <span>({text{GeV/}}c)</span>. Cumulative protons in comparison with the noncumulative ones are produced at large values of the variable <span>({{n}_{{text{c}}}} &gt; 1)</span> and in this region the energy of cumulative protons also increases. The experimentally obtained values of the cumulative proton energies are compared with the estimations got by the formula of the uncertainty principle. It has been shown that the energy of cumulative protons obtained by using the formula of the uncertainty principle is in agreement with the experimental results.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"3 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202420","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
Two Particles Correlations in Ion Collisions 离子碰撞中的两粒子相关性
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/s1063779624700795
O. Rogachevsky, A. Bychkov, S. Hnatič
{"title":"Two Particles Correlations in Ion Collisions","authors":"O. Rogachevsky, A. Bychkov, S. Hnatič","doi":"10.1134/s1063779624700795","DOIUrl":"https://doi.org/10.1134/s1063779624700795","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Two particles correlations are a useful tool to study the event structures of particle production in multiparticle events of particle interactions. Structures of events are caused by various mechanisms of particle production and could be separated with some global observables of the events. Examining event structures with these methods can give new insight into the nature of these interactions.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"26 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202421","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
Investigationof the np → npπ+π– Reaction at Momenta P0 > 3 GeV/c 对动量 P0 > 3 GeV/c 时 np → npπ+π- 反应的研究
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/S1063779624700552
A. P. Ierusalimov, S. G. Arakelyan, A. V. Belyaev, V. P. Ladygin, A. Yu. Troyan
{"title":"Investigationof the np → npπ+π– Reaction at Momenta P0 > 3 GeV/c","authors":"A. P. Ierusalimov,&nbsp;S. G. Arakelyan,&nbsp;A. V. Belyaev,&nbsp;V. P. Ladygin,&nbsp;A. Yu. Troyan","doi":"10.1134/S1063779624700552","DOIUrl":"10.1134/S1063779624700552","url":null,"abstract":"<p>The <span>(np to np{{pi }^{ + }}{{pi }^{ - }})</span> reaction is investigated at the incident neutron momenta <span>({{P}_{0}})</span> = 3.83 and 5.20 GeV/<i>c</i>. Contributions of different diagrams to the reaction cross section are calculated at the momenta from the threshold to 12 GeV/c. It is shown that the main contributions to the <span>(np to np{{pi }^{ + }}{{pi }^{ - }})</span> reaction at momenta above <span>({{P}_{0}})</span> &gt; 3 GeV/<i>c</i> come from diagrams of the reggeized <span>(pi )</span>-meson exchange model (OPER).To study spin effects, the reaction <span>(np to np{{Delta }^{{ + + }}}{{Delta }^{ - }})</span> was separated. It is shown that description of the spin density matrix [<span>({{rho }_{{ij}}})</span>] requires taking into account the ρ-meson exchange diagram. The reaction <span>(np to np{{rho }^{0}})</span> is separated by background subtraction method. The investigation has shown that <span>({{rho }^{0}})</span>-meson production is described by suspended diagrams of the OPER model.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"909 - 915"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202360","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
Proton and Carbon-Ion Minibeam Therapy: From Modeling to Treatment 质子和碳离子微束疗法：从建模到治疗
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/S1063779624700606
I. A. Pshenichnov, U. A. Dmitrieva, S. D. Savenkov, A. O. Svetlichnyi
{"title":"Proton and Carbon-Ion Minibeam Therapy: From Modeling to Treatment","authors":"I. A. Pshenichnov,&nbsp;U. A. Dmitrieva,&nbsp;S. D. Savenkov,&nbsp;A. O. Svetlichnyi","doi":"10.1134/S1063779624700606","DOIUrl":"10.1134/S1063779624700606","url":null,"abstract":"<p>Arrays of minibeams of protons and <sup>12</sup>C in tissue-like media were modeled with Geant4 toolkit. A set of beam energies was used in simulations to provide a Spead-out Bragg peak (SOBP) extended by 6 cm in depth for protons as well as for <sup>12</sup>C. In both cases, beams of 0.3 or 0.5 mm FWHM were arranged at the entrance to a water phantom either on a rectangular or an hexagonal grid to compare two kinds of projectiles and different minibeam patterns. Differential and cumulative dose-volume histograms (DVH) were calculated and compared for protons and <sup>12</sup>C as dose uniformity metrics. A uniform dose distribution was easily achieved with protons due to an enhanced lateral scattering of these projectiles in comparison to <sup>12</sup>C. The cumulative DVHs calculated for 0.3 or 0.5 mm minibeams almost coincide in the target volume, but diverge for different grid patterns. In contrast, cumulative entry DVHs were found similar for both grid patterns, but different for 0.3 and 0.5 mm minibeams.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"929 - 934"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202363","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
Model Investigation of Transverse Momentum Cumulants of Different Orders in Nuclear-Nuclear Collisions 核-核碰撞中不同阶横向动量累积量的模型研究
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/S1063779624700564
A. Zvyagina, E. Andronov
{"title":"Model Investigation of Transverse Momentum Cumulants of Different Orders in Nuclear-Nuclear Collisions","authors":"A. Zvyagina,&nbsp;E. Andronov","doi":"10.1134/S1063779624700564","DOIUrl":"10.1134/S1063779624700564","url":null,"abstract":"<p>In this research, we analyze transverse momentum cumulants of different orders (<span>({{K}_{n}})</span>) for charged inclusive hadrons produced in <span>({text{Bi}} + {text{Bi}})</span> collisions using the UrQMD-3.4 model events. The analysis is carried out in two ways: with the standard method, in which the study is carried out over the entire rapidity interval, and also with the sub-event method, which suppresses the influence of short-range correlations. Dependencies of second-, third-, and fourth-order cumulants on collision energy were obtained. The paper also provides a comparison of <span>(p + p)</span> and <span>({text{Bi}} + {text{Bi}})</span> collisions that indicated the simultaneous saturation for both systems at <span>(sqrt {{{s}_{{NN}}}} approx 5)</span> GeV.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"916 - 919"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202410","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
Hadron Contribution of Light-by-Light Scattering to Hyperfine Splitting in Muonium 强子逐光散射对超正弦分裂的贡献
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/S1063779624700114
V. I. Korobov, F. A. Martynenko, A. P. Martynenko, A. V. Eskin
{"title":"Hadron Contribution of Light-by-Light Scattering to Hyperfine Splitting in Muonium","authors":"V. I. Korobov,&nbsp;F. A. Martynenko,&nbsp;A. P. Martynenko,&nbsp;A. V. Eskin","doi":"10.1134/S1063779624700114","DOIUrl":"10.1134/S1063779624700114","url":null,"abstract":"<p>The hadron light-by-light scattering contribution to the superfine splitting of the muonium ground state is calculated. The quasi-potential of muon and electron interaction is expressed in terms of the form factor of transition of two virtual photons to a meson. The contributions of pseudoscalar, pseudovector, scalar, and tensor mesons are considered.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"746 - 750"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412243","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
On Measuring the Characteristics of Quark and Gluon Jets in Hadron–Hadron Collisions 关于测量强子-强子对撞中夸克和胶子射流的特征
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/s1063779624700527
S. G. Shulha
{"title":"On Measuring the Characteristics of Quark and Gluon Jets in Hadron–Hadron Collisions","authors":"S. G. Shulha","doi":"10.1134/s1063779624700527","DOIUrl":"https://doi.org/10.1134/s1063779624700527","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>To measure the characteristics of quark and gluon jets in hadron–hadron collisions, two samples of jets are used. Given the large statistics of jets at the LHC, the two-sample method requires taking into account the following corrections: (1) use of measured fractions of quark and gluon jets instead of the model ones, (2) amendment for the contribution of jets with an unidentified type, (3) taking into account the dependence of the distributions of quark and gluon jets on the conditions for jet sample selections. The paper presents an improved two-sample method that takes into account these corrections.</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":"142202376","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
Prospects of the MPD Detector for Measuring the Spectra of Identified Hadrons in $${mathbf{Bi}} + {mathbf{Bi}}$$ Collisions at Energy $$sqrt {{{s}_{{NN}}}} = 9.2$$ GeV MPD探测器在$${{mathbf{Bi}}+{mathbf{Bi}}$对撞中测量已识别中子光谱的前景+ {mathbf{Bi}}$ 对撞的能量 $$sqrt {{{s}_{{NN}}}} = 9.2$$ GeV
IF 0.4 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI: 10.1134/s1063779624700291
A. Mudrokh
{"title":"Prospects of the MPD Detector for Measuring the Spectra of Identified Hadrons in $${mathbf{Bi}} + {mathbf{Bi}}$$ Collisions at Energy $$sqrt {{{s}_{{NN}}}} = 9.2$$ GeV","authors":"A. Mudrokh","doi":"10.1134/s1063779624700291","DOIUrl":"https://doi.org/10.1134/s1063779624700291","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Measuring the spectra of light hadrons is one of the priority tasks of the MPD experiment at NICA. The assessment of the efficiency of recording differential transverse momentum spectra of production of identified hadrons in the MPD detector, which are produced in collisions of bismuth nuclei at an energy of <span>(sqrt {{{s}_{{NN}}}} = 9.2)</span> GeV, is presented.</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":"142202378","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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