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The Liquid Scintillator Track Detector 液体闪烁体轨迹探测器
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S106377962670111X
V. V. Ustinov, R. Yu. Kolesnikov, O. V. Kutinova, E. V. Sukhov, D. V. Ustinov
{"title":"The Liquid Scintillator Track Detector","authors":"V. V. Ustinov,&nbsp;R. Yu. Kolesnikov,&nbsp;O. V. Kutinova,&nbsp;E. V. Sukhov,&nbsp;D. V. Ustinov","doi":"10.1134/S106377962670111X","DOIUrl":"10.1134/S106377962670111X","url":null,"abstract":"<p>The track detector based on organic scintillators and using Fresnel lenses has been developed at the JINR Laboratory of High Energy Physics. The developed detectors are necessary to test an opportunity of obtaining particle tracks using arrays of silicon photomultipliers (SiPM). When measuring, well-recognized tracks from cosmic muons were obtained in the plastic and liquid scintillators by means of a short-focus Fresnel lens. The spatial resolution of the liquid scintillator detector was 2.1 mm.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"935 - 940"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965506","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
Contribution of Linearly Polarised Gluons in Charmonium Production within the Soft Gluon Resummation Approach 在软胶子恢复法中，线极化胶子对Charmonium生产的贡献
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701376
V. A. Saleev, K. K. Shilyaev
{"title":"Contribution of Linearly Polarised Gluons in Charmonium Production within the Soft Gluon Resummation Approach","authors":"V. A. Saleev,&nbsp;K. K. Shilyaev","doi":"10.1134/S1063779626701376","DOIUrl":"10.1134/S1063779626701376","url":null,"abstract":"<p>In this article, the soft gluon resummation approach is used for modelling transverse-momentum dependent parton distributions. The transverse-momentum dependent factorisation allows to get access both to unpolarised parton distribution functions and to the Boer–Mulders functions which describe linearly polarised partons in unpolarised protons. The estimation for ratio of contributions of Boer–Mulders and unpolarised parton distributions for charmonium production in a range of center-of-mass energies of initial protons <span>(sqrt s )</span> is made. The nonrelativistic QCD is used as a hadronisation model.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1079 - 1082"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965510","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
Updated QCD Analysis of the Bjorken Sum Rule Based on the Analytic Perturbation Theory 基于解析摄动理论的Bjorken和规则的更新QCD分析
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701303
D. A. Volkova, N. A. Gramotkov, A. V. Kotikov, O. V. Teryaev, O. P. Solovtsova
{"title":"Updated QCD Analysis of the Bjorken Sum Rule Based on the Analytic Perturbation Theory","authors":"D. A. Volkova,&nbsp;N. A. Gramotkov,&nbsp;A. V. Kotikov,&nbsp;O. V. Teryaev,&nbsp;O. P. Solovtsova","doi":"10.1134/S1063779626701303","DOIUrl":"10.1134/S1063779626701303","url":null,"abstract":"<p>We present an updated analysis of the Bjorken sum rule for the difference between the first moments of the spin-dependent structure function <span>({{g}_{1}})</span> of the proton and neutron in the low-momentum-transfer region, <span>({{Q}^{2}} &lt; 1)</span> GeV<sup>2</sup>. Our theoretical description is based on singularity-free analytic perturbation theory and an original method for matching the large- and low-<span>({{Q}^{2}})</span> regions. After fixing the QCD parameters at large <span>({{Q}^{2}})</span>, we extend the description to the lowregion by using the Gerasimov–Drell–Hearn sum rule as a boundary condition. In this way, we avoid the divergence problem of the higher-twist representation written as an expansion in inverse powers of <span>(1{kern 1pt} /{kern 1pt} {{Q}^{2}})</span> as <span>({{Q}^{2}} to 0)</span>. We investigate the stability of our theoretical predictions and their agreement with new Jefferson Lab experimental data on the nucleon spin structure at values of <span>({{Q}^{2}})</span> very close to zero.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1041 - 1047"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965516","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
Masses of Light Quarks in the 1/Nc Chiral Perturbation Theory 1/Nc手性微扰理论中轻夸克的质量
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701236
A. A. Osipov
{"title":"Masses of Light Quarks in the 1/Nc Chiral Perturbation Theory","authors":"A. A. Osipov","doi":"10.1134/S1063779626701236","DOIUrl":"10.1134/S1063779626701236","url":null,"abstract":"<p>The mass formulas obtained for pseudoscalar <span>({{pi }^{ pm }},{{K}^{ pm }},{{K}^{0}}({{bar {K}}^{0}}))</span> mesons in the NLO approximation of combined expansion in momenta, quark masses <span>({{m}_{{text{q}}}})</span>, and <span>(1{kern 1pt} /{kern 1pt} {{N}_{{text{c}}}})</span> allow us to conclude that the ratios <span>({{m}_{u}}{kern 1pt} /{kern 1pt} {{m}_{d}})</span> and <span>({{m}_{s}}{kern 1pt} /{kern 1pt} {{m}_{d}})</span> belong to a third-order algebraic curve. It is shown that the inclusion of higher-order corrections does not affect the shape of the curve. The data on the effective Lagrangian constants found from lattice calculations allow us to determine the quark masses.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1002 - 1006"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965376","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
Evidence of Anisotropic Hydrodynamics from Recent Data on Pion and Kaon Emission in Heavy ion Collisions in the BM@N Experiment 来自BM@N实验中重离子碰撞中介子和介子发射的最新数据的各向异性流体力学证据
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701261
A. T. D’yachenko
{"title":"Evidence of Anisotropic Hydrodynamics from Recent Data on Pion and Kaon Emission in Heavy ion Collisions in the BM@N Experiment","authors":"A. T. D’yachenko","doi":"10.1134/S1063779626701261","DOIUrl":"10.1134/S1063779626701261","url":null,"abstract":"<p>In this paper, a nonequilibrium hydrodynamic approach is developed in which the nonequilibrium state of the nuclear medium is described by jointly solving the kinetic equation and hydrodynamic equations. It is shown that, in accordance with the solution of the kinetic equation, the effective temperature may depend on the particle emission angle. This anisotropic hydrodynamics with <i>hot spot</i> identification agrees with the experimental data of the BM@N collaboration for pions and kaons in collisions of <sup>40</sup>Ar ions with various targets at an energy of 3.2 GeV per nucleon. The first comparison of our approach with the experimental data obtained for the differential yields of protons, deuterons, and tritons in the BM@N Collaboration experiment with the same nuclei turned out to be quite successful.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1018 - 1025"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965384","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
Nearly Forgotten Results in Development of Physical Cosmology 物理宇宙学发展中几乎被遗忘的结果
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701078
A. F. Zakharov
{"title":"Nearly Forgotten Results in Development of Physical Cosmology","authors":"A. F. Zakharov","doi":"10.1134/S1063779626701078","DOIUrl":"10.1134/S1063779626701078","url":null,"abstract":"<p>NICA is a tool to investigate the early Universe in laboratory. It would be reasonable to recall some essential issues in physical cosmology development. GR was created by A. Einstein in 1915. In 1917 Einstein proposed the first (static) cosmological model. Later A. Eddington proved that the model is unstable therefore it can not be realizable in nature. In 1922 and 1924 A.A. Friedmann found non-stationary solutions for cosmological equations written in the framework of GR. In 1927 G. Lemaître obtained very similar results and, in addition, he derived the Hubble law (E. Hubble obtained this law from observations). Unfortunately, G. Lemaître published his paper in not very popular Belgium journal. In 1931 Lemaître proposed the first version of hot Universe model (he called it hypothesis of the primeval atom). In his book “The Primeval Atom—An Essay on Cosmogony” Lemaître predicted even a background radiation as a signature of his model. At the end of 1940s G. Gamow and his students proposed their hot universe model where he explained primordial nucleosythesis of helium at the initial stage of the Universe evolution. One of the features of Lemaître–Gamow model was an existence of CMB radiation with a temperature around a few K. It was recalled that the discovery of CMB radiation was done by T. Shmaonov in 1956 and his paper was published in 1957 (several years before the discovery done by Penzias and Wilson). In 1965, 1970 E.B. Gliner proposed vacuum like equation of matter which could correspond to exponential explosion of the Universe which was later called inflation. For decades in USSR, A.A. Friedmann’s cosmologocal non-stationary models were treated as purely mathematical results without cosmological and astronomical applications. On September 16, 1925 Friedmann passed away untimely and it would be reasonable to remind today his great contribution in physical cosmology since the authors book on Friedmann wrote “Similarly to Copernicus who forced the Earth to move, Friedmann forced the Universe to expand.”</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"909 - 921"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965513","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
Studying Properties of the SU(2) QCD by Lattice Field Theory Methods 用点阵场论方法研究SU(2) QCD的性质
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701352
I. E. Kudrov, V. G. Bornyakov, V. A. Goy
{"title":"Studying Properties of the SU(2) QCD by Lattice Field Theory Methods","authors":"I. E. Kudrov,&nbsp;V. G. Bornyakov,&nbsp;V. A. Goy","doi":"10.1134/S1063779626701352","DOIUrl":"10.1134/S1063779626701352","url":null,"abstract":"<p>We present new results on properties of <span>(SU(2))</span> QCD in lattice regularization. Our main goal is to find the transition line confinement—deconfinement in <span>(mu {text{--}}T)</span> plane. We compute the Polyakov loop and the string tension to determine this line.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1068 - 1072"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965298","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
Search for Dibaryon Resonances in the Reactions dd → ddππ and pd → pdππ 在dd→ddππ和pd→pdππ反应中寻找双重子共振
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701273
Yu. N. Uzikov, A. A. Temerbayev, N. T. Tursunbayev
{"title":"Search for Dibaryon Resonances in the Reactions dd → ddππ and pd → pdππ","authors":"Yu. N. Uzikov,&nbsp;A. A. Temerbayev,&nbsp;N. T. Tursunbayev","doi":"10.1134/S1063779626701273","DOIUrl":"10.1134/S1063779626701273","url":null,"abstract":"<p>The isoscalar dibaryon resonance <span>({{D}_{{03}}}(2380))</span>, discovered at WASA@COSY in the total cross section of the reaction <span>(pn to d{{pi }^{0}}{{pi }^{0}})</span> and in the elastic <i>pn</i> scattering in the energy range corresponding to the invariant mass of the pn system of 2380 MeV, can reveal itself in the <span>(pd to pdpi pi )</span> and <span>(dd to ddpi pi )</span> reactions at higher energies due to deuteron excitation in the <span>(t)</span> channel. In this paper, the cross sections of these reactions are estimated based on the model of the reaction <span>(pn to d{{pi }^{0}}{{pi }^{0}})</span>, proposed earlier by Platonova and Kukulin.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1026 - 1031"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965335","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
Relativistic Quantum-Mechanical Description of Acceleration of Charged Vortex Particles by a Uniform Electric Field 均匀电场作用下带电涡旋粒子加速的相对论量子力学描述
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701200
A. J. Silenko, Qi Meng, Ziqiang Huang, Xuan Liu, Wei Ma, Zhen Yang, Liang Lu, Pengming Zhang, Liping Zou
{"title":"Relativistic Quantum-Mechanical Description of Acceleration of Charged Vortex Particles by a Uniform Electric Field","authors":"A. J. Silenko,&nbsp;Qi Meng,&nbsp;Ziqiang Huang,&nbsp;Xuan Liu,&nbsp;Wei Ma,&nbsp;Zhen Yang,&nbsp;Liang Lu,&nbsp;Pengming Zhang,&nbsp;Liping Zou","doi":"10.1134/S1063779626701200","DOIUrl":"10.1134/S1063779626701200","url":null,"abstract":"<p>Stationary wave eigenfunctions of a charged Laguerre–Gauss beam accelerated in a uniform electric field are rigorously derived in the framework of relativistic quantum mechanics. The evolution of beam parameters during acceleration is calculated in detail. The simple classical model of this evolution is proposed. The acceleration extraordinary suppresses transverse spreading of the beam. Our results show that vortex particle beams can be accelerated without destroying their intrinsic vortex properties.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"985 - 989"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965337","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
A Method for Increasing the Efficiency of Detecting Minimum Ionizing Particles Using MCP Detectors 一种提高MCP探测器检测最小电离粒子效率的方法
IF 0.5 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2026-09-15 DOI: 10.1134/S1063779626701315
F. F. Valiev, N. I. Kalinichenko, A. Kozhedub, N. A. Makarov, V. N. Popov, G. A. Feofilov
{"title":"A Method for Increasing the Efficiency of Detecting Minimum Ionizing Particles Using MCP Detectors","authors":"F. F. Valiev,&nbsp;N. I. Kalinichenko,&nbsp;A. Kozhedub,&nbsp;N. A. Makarov,&nbsp;V. N. Popov,&nbsp;G. A. Feofilov","doi":"10.1134/S1063779626701315","DOIUrl":"10.1134/S1063779626701315","url":null,"abstract":"<p>The method of increasing the detection efficiency of minimum ionizing particles by reducing the registration thresholds along with the application of the coincidence circuit is proposed and tested. The suggested method features the reduction of background noise by several orders of magnitude.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"57 5","pages":"1048 - 1050"},"PeriodicalIF":0.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965342","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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