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Contributions of QED Diagrams with Vacuum Polarization Insertions to the Lepton Anomaly within the Mellin–Barnes Representation 带有真空极化插入的 QED 图对梅林-巴恩斯表征中的质子反常的贡献
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/S1063779624700072
O. Solovtsova, V. Lashkevich, L. Kaptari
{"title":"Contributions of QED Diagrams with Vacuum Polarization Insertions to the Lepton Anomaly within the Mellin–Barnes Representation","authors":"O. Solovtsova,&nbsp;V. Lashkevich,&nbsp;L. Kaptari","doi":"10.1134/S1063779624700072","DOIUrl":"10.1134/S1063779624700072","url":null,"abstract":"<p>We investigate the radiative QED corrections to the lepton (<span>(L = e,,, mu )</span>, and <span>(tau )</span>) anomalous magnetic moment arising from vacuum polarization diagrams by four closed lepton loops. The method is based on the consecutive application of dispersion relations for the polarization operator and the Mellin–Barnes transform for the propagators of massive particles. This allows one to obtain, for the first time, exact analytical expressions for the radiative corrections to the anomalous magnetic moments of leptons from diagrams with insertions of four identical lepton loops all of the same type <span>(ell )</span> different from the external one, <span>(L)</span>. The result is expressed in terms of the mass ratio <span>(r = {{{{m}_{ell }}} mathord{left/ {vphantom {{{{m}_{ell }}} {{{m}_{L}}}}} right. kern-0em} {{{m}_{L}}}})</span>. We investigate the behaviour of the exact analytical expressions at <span>(r to 0)</span> and <span>(r to infty )</span> and compare with the corresponding asymptotic expansions known in the literature.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"725 - 730"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412245","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
Hidden-Charm Strong Decays of Charmonium-Like State Y(4230) 查莫铵类态Y(4230)的隐谐强衰变
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/S1063779624700175
G. Ganbold
{"title":"Hidden-Charm Strong Decays of Charmonium-Like State Y(4230)","authors":"G. Ganbold","doi":"10.1134/S1063779624700175","DOIUrl":"10.1134/S1063779624700175","url":null,"abstract":"<p>We have studied hidden-charm strong decays of the charmonium-like resonant state <span>(Y(4320))</span> within the framework of a confined quark model by interpreting the resonance as a four-quark state with molecular-type interpolating current. The strong decay of <span>(Y)</span> into a vector and a scalar resonance, with the latter decaying, subsequently to a pair of charged pseudoscalar states, has been investigated. We have calculated the partial widths of the strong decays <span>(Y to {{pi }^{ + }}{{pi }^{ - }}{J mathord{left/ {vphantom {J Psi }} right. kern-0em} Psi })</span> and <span>(Y to {{K}^{ + }}{{K}^{ - }}{J mathord{left/ {vphantom {J Psi }} right. kern-0em} Psi })</span>, and their branching ratio, which is recently determined by the BESIII Collaboration. The estimated proportion of branching and the calculated partial strong decay widths are in reasonable agreement with the most recent experimental results.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"781 - 785"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412246","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
Anisotropic Flow Measurements of Identified Hadrons with Fixed-Target Mode of MPD Detector at NICA 在 NICA 使用 MPD 探测器的固定目标模式测量已识别中子的各向异性流
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/S1063779624700369
P. Parfenov, M. Mamaev, A. Taranenko
{"title":"Anisotropic Flow Measurements of Identified Hadrons with Fixed-Target Mode of MPD Detector at NICA","authors":"P. Parfenov,&nbsp;M. Mamaev,&nbsp;A. Taranenko","doi":"10.1134/S1063779624700369","DOIUrl":"10.1134/S1063779624700369","url":null,"abstract":"<p>Main goals of beam energy scan programs with relativistic heavy ions at energies <span>(sqrt {{{s}_{{NN}}}} )</span> = 2–11 GeV, like the one planned at the Multi-Purpose Detector (MPD) at the NICA collider, are the investigation of the Equation of State (EOS) and the search for potential phase transitions in dense baryonic matter. In this work, we discuss the layout of the MPD experiment in the fixed-target mode and the anticipated performance for differential anisotropic flow measurements of identfied hadrons at energies <span>(sqrt {{{s}_{{NN}}}} )</span> = 2.3–3.5 GeV.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"853 - 858"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412249","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
Deuteron Spin-Flip System Based on Quadrupole Correctors of the Nuclotron (JINR) 基于核旋转加速器四极校正器的氘核自旋翻转系统（JINR）
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/S1063779624700096
E. D. Tsyplakov, Yu. N. Filatov, A. M. Kondratenko, M. A. Kondratenko, V. A. Lopatkin, S. V. Vinogradov, A. V. Butenko, S. A. Kostromin, V. P. Ladygin, E. M. Syresin, E. A. Butenko, E. S. Bogdanov
{"title":"Deuteron Spin-Flip System Based on Quadrupole Correctors of the Nuclotron (JINR)","authors":"E. D. Tsyplakov,&nbsp;Yu. N. Filatov,&nbsp;A. M. Kondratenko,&nbsp;M. A. Kondratenko,&nbsp;V. A. Lopatkin,&nbsp;S. V. Vinogradov,&nbsp;A. V. Butenko,&nbsp;S. A. Kostromin,&nbsp;V. P. Ladygin,&nbsp;E. M. Syresin,&nbsp;E. A. Butenko,&nbsp;E. S. Bogdanov","doi":"10.1134/S1063779624700096","DOIUrl":"10.1134/S1063779624700096","url":null,"abstract":"<p>A new method for deuteron spin-flip is proposed, which uses the spin resonance crossing with betatron frequencies. The resonance is induced by quadrupole correctors of the Nuclotron, which make it possible to control simultaneously the detuning from the resonance and its power. The deuteron spin-flip is due to adiabatic resonance crossing by the slow variation of the betatron frequency. An advantage of this method is that the beam energy remains constant at the induced resonance crossing; it is determined by the chosen frequency of vertical betatron oscillations. The possibility of experimental verification of the deuteron spin-flip in the Nuclotron is discussed.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"736 - 740"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412266","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
High-Energy Production of ηc Mesons in Proton–Proton Collisions 质子-质子碰撞中ηc介子的高能产生
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/S106377962470031X
A. V. Anufriev, V. A. Saleev
{"title":"High-Energy Production of ηc Mesons in Proton–Proton Collisions","authors":"A. V. Anufriev,&nbsp;V. A. Saleev","doi":"10.1134/S106377962470031X","DOIUrl":"10.1134/S106377962470031X","url":null,"abstract":"<p>The article considers the production of <span>({{eta }_{{text{c}}}})</span> mesons at LHC energies using the parton Reggeization approach and the leading order perturbation theory of quantum chromodynamics. The hadronization of a quark–antiquark pair (<span>(cbar {c})</span>) in <span>({{{{eta }}}_{{text{c}}}})</span> is described in the framework of nonrelativistic quantum chromodynamics and with the using of color evaporation model. The calculation results are compared with experimental data for the <span>({{eta }_{{text{c}}}})</span> production cross section in proton–proton collisions obtained by the LHCb collaboration. Predictions have been made for the kinematic conditions of the LHCb and ATLAS collaboration experiments at an energy <span>(sqrt s = )</span> 13 TeV.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"836 - 840"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412270","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
The Gorishny–Isaev Vacuum Integrations and UV(IR)-Regime 戈里什尼-伊萨耶夫真空积分和紫外（红外）机制
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/S1063779624700229
I. V. Anikin
{"title":"The Gorishny–Isaev Vacuum Integrations and UV(IR)-Regime","authors":"I. V. Anikin","doi":"10.1134/S1063779624700229","DOIUrl":"10.1134/S1063779624700229","url":null,"abstract":"<p>We present the further development of the vacuum massless integrations. In particular, in the Gorishny–Isaev formula, it has been shown that the delta function representing UV-regime should be treated within the sequential approach. It allows us to resolve the problem of vacuum integrations related to the analytical continuation of diagram indices.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"55 4","pages":"808 - 810"},"PeriodicalIF":0.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409225","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
MPD Data Lab: Towards the Modern Data Analysis Framework for the MPD Experiment MPD 数据实验室：为 MPD 实验建立现代数据分析框架
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/s1063779624700680
J. Buša, A. Bychkov, S. Hnatič, A. Krylov, V. Krylov, O. Rogachevsky
{"title":"MPD Data Lab: Towards the Modern Data Analysis Framework for the MPD Experiment","authors":"J. Buša, A. Bychkov, S. Hnatič, A. Krylov, V. Krylov, O. Rogachevsky","doi":"10.1134/s1063779624700680","DOIUrl":"https://doi.org/10.1134/s1063779624700680","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>MPDRoot is an off-line software framework for simulation, reconstruction, and physical analysis of the simulated or experimental data for MPD experiment at NICA collider. The experiment is projected to run for a few decades and to obtain ~10<sup>8</sup> events of heavy ion collisions, collecting the data for physics analysis at the 100 PB scale. For overall experiment success it is imperative to have state of the art data analysis software, which integrates best of available latest technologies, while adhering to time-proven, most effective development methodologies. In this paper, we introduce the MPD Data Lab—the technological integration of Acceptance Test Driven Development and Rapid Development concepts into the MPDRoot framework. At the beginning, we standardized the existing codebase by designing and writing API. This was a necessary step to be able to plug-in the external diagnostic software entities and to make the in-depth comparison of different realizations of the reconstruction modules possible. The logic of the diagnostics is encapsulated into the separate controller—the QA Engine, while its visualization is provided by JupyterLab framework. We show how full integration of MPDRoot’s libraries into JupyterLab enables to use the power of rapid development provided by JupyterLab technology to enhance productivity by fast prototyping of MPDRoot’s algorithms. The combination of these technologies together with the existing development environment form a software complex, providing means to accomplish the long term strategic objectives—competent software development with reliable quality control and algorithm innovation.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"41 4 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202374","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
Amplitude of Scattering of Protons on the Bounded Nuclear Nucleons from Analysis of the Proton-Nucleus Scattering 从质子-核子散射分析看质子对有界核子的散射幅度
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/s1063779624700801
V. K. Lukyanov, E. V. Zemlyanaya, K. V. Lukyanov, I. A. M. Abdul-Magead
{"title":"Amplitude of Scattering of Protons on the Bounded Nuclear Nucleons from Analysis of the Proton-Nucleus Scattering","authors":"V. K. Lukyanov, E. V. Zemlyanaya, K. V. Lukyanov, I. A. M. Abdul-Magead","doi":"10.1134/s1063779624700801","DOIUrl":"https://doi.org/10.1134/s1063779624700801","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of calculations and their comparison with experimental data of proton scattering on <sup>28</sup>Si, <sup>40</sup>Ca, <sup>58</sup>Ni and <sup>208</sup>Pb nuclei at energies from 200 to 1000 MeV are investigated based on the optical potential model in which the amplitude of scattering of an incident proton on a bound nuclear nucleon is explicitly revealed. This amplitude depends on three parameters, namely, the total nucleon-nucleon scattering cross section, the ration of real to imaginary parts of scattering amplitude at forward angles, and on the slope parameter. This analysis of proton-nucleus scattering data allows one to establish these parameters and compare them with those from the analysis of proton scattering on a free unbounded nucleon.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"8 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202381","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
Σ Hyperons Production in pp and p-Pb Collisions at LHC with ALICE 利用 ALICE 在大型强子对撞机的 pp 和 p-Pb 对撞中产生 Σ 超子
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/s1063779624700710
A. Borisov
{"title":"Σ Hyperons Production in pp and p-Pb Collisions at LHC with ALICE","authors":"A. Borisov","doi":"10.1134/s1063779624700710","DOIUrl":"https://doi.org/10.1134/s1063779624700710","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In addition to <span>(Lambda )</span> hyperons, new data on <span>(Sigma )</span> hyperons production are compared to different Monte-Carlo models and contribute to understand hadron production mechanisms. The first measurements of the transverse momentum (<span>({{p}_{{text{T}}}})</span>) spectra of <span>({{Sigma }^{0}})</span> and <span>({{overline Sigma }^{0}})</span> hyperons in pp collisions at <span>(sqrt s = 7)</span> TeV at the LHC are presented. The <span>({{Sigma }^{0}})</span>(<span>({{overline Sigma }^{0}})</span>) is reconstructed via its electromagnetic decay channel <span>(Lambda (overline Lambda ) + gamma )</span>, while the <span>(Lambda )</span>(<span>(overline Lambda )</span>) baryon is detected via its decay into <span>(p + {{pi }^{ - }})</span> (<span>(bar {p})</span> + <span>({{pi }^{ + }})</span>). The low-energy photon is measured via conversion into <span>({{e}^{ + }}{{e}^{ - }})</span> pairs in the detector material and in PHOS calorimeter by exploiting the unique capability of the ALICE detector. The complementary results on the first detection of <span>({{Sigma }^{ + }})</span> and <span>({{overline Sigma }^{ - }})</span> hyperon at the LHC with ALICE are shown in pp collisions at <span>(sqrt s = 13)</span> TeV. The <span>({{Sigma }^{ + }})</span>(<span>({{overline Sigma }^{ - }})</span>) is reconstructed via its weak decay into <i>p</i><span>((bar {p}) + {{pi }^{0}})</span> with the challenging detection of low-energy photons from <span>({{pi }^{0}})</span> decay. Also, the first reconstruction of <span>({{overline Sigma }^{ pm }} to bar {n} + {{pi }^{ pm }})</span> decays and <span>({{overline Sigma }^{ pm }})</span> transverse momenta spectra in pp and <i>p</i>-Pb collisions are presented. Antineutron is identified and reconstructed with PHOS by unique signature of the annihilation process.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"59 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202414","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
Radiation Damage to SiPM Irradiated with Fast Neutrons 用快中子辐照的 SiPM 的辐射损伤
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/s1063779624700898
N. I. Zamyatin, Yu. A. Kopylov, E. A. Streletskaya, B. L. Topko, A. I. Sheremetyeva
{"title":"Radiation Damage to SiPM Irradiated with Fast Neutrons","authors":"N. I. Zamyatin, Yu. A. Kopylov, E. A. Streletskaya, B. L. Topko, A. I. Sheremetyeva","doi":"10.1134/s1063779624700898","DOIUrl":"https://doi.org/10.1134/s1063779624700898","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Silicon pixel photomultipliers (SiPM) are widely used in various fields of scientific experimental equipment. As a rule, the use of SiPM in physical experiments at accelerators assumes the presence of a radiation background in the area where the detection equipment is located. Radiation defects created in the space charge region (SCR) of pixels lead to an increase in thermal generation current, which is a source of noise. The main and practical issues for any experiment are lifetime and degradation rate of the main parameters and SiPM operating modes that reduce the negative effects from the radiation damage accumulation over time. This paper attempts to practically answer some of these questions.</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":"142202453","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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