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Contribution of QED Compton Scattering Subprocess to Prompt Photon Production in Collisions of Longitudinally Polarized Protons at NICA Energies 在 NICA 能量下纵向极化质子碰撞中 QED 康普顿散射子过程对猝发光子产生的贡献
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701802
M. R. Alizada, A. I. Ahmadov, A. B. Arbuzov
{"title":"Contribution of QED Compton Scattering Subprocess to Prompt Photon Production in Collisions of Longitudinally Polarized Protons at NICA Energies","authors":"M. R. Alizada,&nbsp;A. I. Ahmadov,&nbsp;A. B. Arbuzov","doi":"10.1134/S1547477124701802","DOIUrl":"10.1134/S1547477124701802","url":null,"abstract":"<p>Contributions of the subprocesses of mixed chromo-electrodynamic <span>(qg to qgamma )</span> and pure electrodynamic Compton scattering <span>(qgamma to qgamma )</span> to the process of prompt photon production in the collision of longitudinal polarized protons are investigated. The dependence of the differential cross section on the sum of energies <span>(sqrt s )</span> of colliding protons, transverse momentum <span>({{p}_{{text{T}}}})</span> of photons, the cosine of scattering angle <span>(cos (theta ))</span>, and pseudorapidity of photons <span>(y)</span> is studied. It is shown that the polarization of initial particles strongly affects the total cross section and the differential distributions. The contribution of a purely electrodynamic Compton subprocess depends on the polarization, and for many ranges of kinematics, it is numerically important in the differential cross section of the process of prompt photon production at energies of the NICA accelerator and, accordingly, should be taken into account in the simulation and analysis of experimental data. The double-spin asymmetry of the prompt photon production process is calculated. It is shown that the contributions of subprocesses <span>(qg to qgamma )</span> and <span>(qgamma to qgamma )</span> to the double spin asymmetry strongly depend on the polarization of initial particles.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"10 - 17"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865463","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}
引用次数: 0
Study of the ϕπ0-System Production in the Charge Exchange Reaction of the 29 GeV Pion Beam with the Berrilium Target of the VES Setup 研究 29 GeV 离子束与 VES 装置中的铍靶发生电荷交换反应时产生的 ϕπ0 系统
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701966
V. Dorofeev, V. G. Gotman, A. V. Ivashin, I. A. Kachaev, Yu. A. Khokhlov, M. S. Kholodenko, V. I. Lisin, V. D. Matveev, E. V. Nazarov, A. N. Plekhanov, D. I. Ryabchikov, A. A. Shumakov, V. P. Sugonyaev, A. M. Zaitsev
{"title":"Study of the ϕπ0-System Production in the Charge Exchange Reaction of the 29 GeV Pion Beam with the Berrilium Target of the VES Setup","authors":"V. Dorofeev,&nbsp;V. G. Gotman,&nbsp;A. V. Ivashin,&nbsp;I. A. Kachaev,&nbsp;Yu. A. Khokhlov,&nbsp;M. S. Kholodenko,&nbsp;V. I. Lisin,&nbsp;V. D. Matveev,&nbsp;E. V. Nazarov,&nbsp;A. N. Plekhanov,&nbsp;D. I. Ryabchikov,&nbsp;A. A. Shumakov,&nbsp;V. P. Sugonyaev,&nbsp;A. M. Zaitsev","doi":"10.1134/S1547477124701966","DOIUrl":"10.1134/S1547477124701966","url":null,"abstract":"<p>We observed <span>(2403 pm 98)</span> events of <span>({{pi }^{ - }} + Be to phi {{pi }^{0}} + A{text{*}})</span> reaction collected in exposition of the VES setup Be target by <span>(2.5 times {{10}^{{11}}})</span> <span>({{pi }^{ - }})</span>-mesons with the 29 GeV momentum. A –<span>(phi {{pi }^{0}})</span> production in a vector state is mostly observed with the recoil <span>(Delta (1232))</span> isobar in a process with <span>(pi )</span> exchange dominance. The <span>(phi {{pi }^{0}})</span> mass spectrum has a complicated shape.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"131 - 136"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865533","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}
引用次数: 0
Cluster Structure of 209Bi 209Bi的团簇结构
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701796
R. Khatun, D. R. Sarker, A. K. F. Haque, M. Nure Alam Abdullah
{"title":"Cluster Structure of 209Bi","authors":"R. Khatun,&nbsp;D. R. Sarker,&nbsp;A. K. F. Haque,&nbsp;M. Nure Alam Abdullah","doi":"10.1134/S1547477124701796","DOIUrl":"10.1134/S1547477124701796","url":null,"abstract":"<p>We present the results of analyses of the <span>(alpha + {{,}^{{209}}}{text{Bi}})</span> elastic scattering for projectile energies <span>({{E}_{alpha }} = 19- 104)</span> MeV in terms of the single folded (SF) potential based on α-cluster and unclustered nucleonic configuration of <sup>209</sup>Bi in the framework of the optical model (OM). The <span>(alpha {{{text{ - }}}^{{209}}}{text{Bi}})</span> potential is constructed by folding the α–α and α–<i>N</i> interactions using their density distributions. In a time-averaged picture, the number of nucleons making α-cluster has been found to be <span>(4{{A}_{alpha }} = 180)</span> and the number of unclustered nucleons as <span>({{A}_{{text{N}}}} = 29)</span>, which gives the renormalization factor equal to unity.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"1 - 9"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865536","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}
引用次数: 0
({{B}_{s}} to D_{s}^{{(*)}}ell {{nu }_{ell }}) and ({{B}_{c}} to {{M}_{{bar {c}c}}}{kern 1pt} l{{nu }_{ell }}) Decays in Covariant Confined Quark Model （{{B}_{s}}と D_{{s}^{{(*)}}ell {{nu }_{ell }}) and({{B}_{c}} to {{M}_{{bar {c}c}}}{kern 1pt} l{{nu }_{ell }}) Decays in Covariant Confined Quark Model
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701917
A. Issadykov, M. Ilyassov
{"title":"({{B}_{s}} to D_{s}^{{(*)}}ell {{nu }_{ell }}) and ({{B}_{c}} to {{M}_{{bar {c}c}}}{kern 1pt} l{{nu }_{ell }}) Decays in Covariant Confined Quark Model","authors":"A. Issadykov,&nbsp;M. Ilyassov","doi":"10.1134/S1547477124701917","DOIUrl":"10.1134/S1547477124701917","url":null,"abstract":"<p>In this paper we showed the theoretical predictions within the covariant quark model of branching ratios <span>({{B}_{s}} to D_{s}^{{(*)}}ell {{nu }_{ell }})</span> and <span>({{B}_{c}} to {{M}_{{bar {c}c}}}{kern 1pt} l{{nu }_{ell }})</span> decays. Our results for <span>({{B}_{s}} to D_{s}^{{(*)}}ell {{nu }_{ell }})</span> are in a good agreement with the data from the latest LHCb experiments as well as lattice quantum chromodynamics simulations. At the same time the theoretical predictions for the ratio <span>({{mathcal{R}}_{{J/psi }}})</span> are more than 2σ less than the experimental data. This may indicate on the possibility of New physics effects in this decay.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"100 - 104"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865537","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}
引用次数: 0
Micromegas-Based Central Tracker for the SPD Experiment 基于micromega的SPD实验中心跟踪器
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S154747712470184X
A. Gongadze, D. Dedovich, N. Koviazina, I. Liashko
{"title":"Micromegas-Based Central Tracker for the SPD Experiment","authors":"A. Gongadze,&nbsp;D. Dedovich,&nbsp;N. Koviazina,&nbsp;I. Liashko","doi":"10.1134/S154747712470184X","DOIUrl":"10.1134/S154747712470184X","url":null,"abstract":"<p>SPD (Spin Physics Detector) is a universal experimental setup that is planned to be installed at the NICA collider under construction. In the first phase of the experiment, the vertex detector will not be used, which will lead to a significant degradation of the momentum resolution and reduce the efficiency of track recognition and secondary vertex reconstruction. To minimize this effect, we propose to supplement the main track system with a Micromegas-based detector located as close as possible to the beam interaction region.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"32 - 44"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865468","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}
引用次数: 0
Erratum to: On the Problem of Spontaneous Isotopic Symmetry Breaking in Nambu–Jona-Lasinio Models 勘误：论南布-若纳-拉西尼奥模型中的自发同位素对称性破坏问题
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477125010029
M. N. Naydenov, M. V. Chizhov
{"title":"Erratum to: On the Problem of Spontaneous Isotopic Symmetry Breaking in Nambu–Jona-Lasinio Models","authors":"M. N. Naydenov,&nbsp;M. V. Chizhov","doi":"10.1134/S1547477125010029","DOIUrl":"10.1134/S1547477125010029","url":null,"abstract":"","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"237 - 237"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865475","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}
引用次数: 0
Structural Properties of Sc-Isotopic Series under Relativistic Mean Field Approach 相对论平均场方法下sc -同位素系列的结构性质
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701814
Jeet Amrit Pattnaik, R. N. Panda
{"title":"Structural Properties of Sc-Isotopic Series under Relativistic Mean Field Approach","authors":"Jeet Amrit Pattnaik,&nbsp;R. N. Panda","doi":"10.1134/S1547477124701814","DOIUrl":"10.1134/S1547477124701814","url":null,"abstract":"<p>Motivated by recent findings on neutron magicity at <i>N</i> = 32 and 34 by Limura et al. [1], we aim to understand the ground state properties and shell effects through isotopic shift in scandium (Sc) isotopes. We performed a systematic study using the NL3* parameter set within the relativistic mean field (RMF) formalism. Properties calculated include binding energy, charge distribution radius, quadrupole deformation parameter, neutron skin thickness, and two-neutron separation energy for Sc isotopes with neutron numbers ranging from <i>N</i> = 22 to 56. Further, a three-point formula is employed to observe the isotopic shift for charge distribution radius and neutron skin thickness. The study highlights notable shape transitions at <i>N</i> = 38–40 and <i>N</i> = 52–54 and ground state shape similarity in Sc isotopes, suggesting significant shell effects. Observing kinks in charge radius and neutron skin thickness, especially at <i>N</i> = 34 along with all conventional neutron magic or semi-magic numbers, confirms shell-closure and stability of the isotopes, enhancing our understanding of neutron magicity and isotope stability.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"18 - 23"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865464","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}
引用次数: 0
On the Possibility of Interaction of a Majorana Fermion with an Electromagnetic Field 论马约拉纳费米子与电磁场相互作用的可能性
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702029
Yu. M. Pismak, O. Yu. Shakhova
{"title":"On the Possibility of Interaction of a Majorana Fermion with an Electromagnetic Field","authors":"Yu. M. Pismak,&nbsp;O. Yu. Shakhova","doi":"10.1134/S1547477124702029","DOIUrl":"10.1134/S1547477124702029","url":null,"abstract":"<p>We propose a method for constructing a model of the interaction of the Majorana fermionic field of spin <span>({1 mathord{left/ {vphantom {1 2}} right. kern-0em} 2})</span> with the photon field. It is shown that as well as for Dirac particles the electromagnetic field can be the gauge field also for Majorana ones. However, only if they are massless. A formulation of the model in which there are no dimensional parameters is given. Its most important features are discussed. The derivation of Ward’s identities is given. Feynman rules in coordinate representation are formulated and the possibility of using them for calculations is demonstrated. It is shown that in the considered model purely photon Green’s functions with odd number of arguments are equal to zero, what by virtue of Furry’s theorem, is fulfilled in quantum electrodynamics.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"161 - 164"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865561","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}
引用次数: 0
Charged Pion Condensation in Dense Quark Matter: from Two to Three Colors 稠密夸克物质中的带电介子凝聚：从二色到三色
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702030
K. G. Klimenko, R. N. Zhokhov
{"title":"Charged Pion Condensation in Dense Quark Matter: from Two to Three Colors","authors":"K. G. Klimenko,&nbsp;R. N. Zhokhov","doi":"10.1134/S1547477124702030","DOIUrl":"10.1134/S1547477124702030","url":null,"abstract":"<p>There are a number of similarities between properties of two color and three color QCD, but there exist evident distinctions between them especially when diquark condensation phenomenon is concerned. It is discussed that prediction of charged pion condensation in dense quark matter has been shown to survive against diquark condensation first for two colors and then the same qualitative picture was reproduced in three color case. This is one more argument in favor of using two color QCD as a lab for investigation of three color QCD in particular of dense quark matter (with three colors) and its various phenomena that cannot be treated by lattice simulations.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"165 - 170"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865562","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}
引用次数: 0
Comparison of SDME and Amplitude Methods in Description of Vector-Meson Production 矢量介子产生描述中SDME和振幅方法的比较
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S154747712470208X
S. I. Manaenkov
{"title":"Comparison of SDME and Amplitude Methods in Description of Vector-Meson Production","authors":"S. I. Manaenkov","doi":"10.1134/S154747712470208X","DOIUrl":"10.1134/S154747712470208X","url":null,"abstract":"<p>It is argued that the amplitude method (direct extraction of helicity-amplitude ratios from data on vector-meson production with hard photon) has much advantages compared to the standard spin-density-matrix-element method for construction of generalized parton distributions from experimental data on nucleons.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"191 - 193"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865529","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}
引用次数: 0
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