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EW One-Loop Corrections to the Longitudinally Polarized Drell–Yan Process. (II) Charged-Current Case 纵向极化drel - yan过程的EW单环修正。（II）充电-电流案例
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702108
S. Bondarenko, Ya. Dydyshka, L. Kalinovskaya, A. Kampf, R. Sadykov, V. Yermolchyk
{"title":"EW One-Loop Corrections to the Longitudinally Polarized Drell–Yan Process. (II) Charged-Current Case","authors":"S. Bondarenko,&nbsp;Ya. Dydyshka,&nbsp;L. Kalinovskaya,&nbsp;A. Kampf,&nbsp;R. Sadykov,&nbsp;V. Yermolchyk","doi":"10.1134/S1547477124702108","DOIUrl":"10.1134/S1547477124702108","url":null,"abstract":"<p>Complete one-loop electroweak radiative corrections to the charged-current Drell–Yan processes <span>(pp to {{ell }^{ + }}{{nu }_{ell }}( + X))</span> and <span>(pp to {{ell }^{ - }}{{bar {nu }}_{ell }}( + X))</span> are presented for the case of longitudinal polarization of initial particles. The results can be used to obtain precise predictions for the kinematic distributions of polarized <span>({{W}^{ pm }})</span> production cross sections, and single- and double-spin asymmetries. Numerical results are obtained using the Monte-Carlo generator ReneSANCe. This research contributes to a global next-to-leading order analysis of polarized parton distributions in proton-proton collisions at RHIC. We proved that the impact of the one-loop electroweak radiative corrections to single- and double-spin asymmetries is negligible.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"199 - 206"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865434","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
Manifestation of Asymptotic QCD Effects in Dijet Production at Large Hadron Collider with 2.76 TeV 2.76 TeV大型强子对撞机Dijet生产中渐近QCD效应的表现
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702145
A. Yu. Egorov, V. T. Kim
{"title":"Manifestation of Asymptotic QCD Effects in Dijet Production at Large Hadron Collider with 2.76 TeV","authors":"A. Yu. Egorov,&nbsp;V. T. Kim","doi":"10.1134/S1547477124702145","DOIUrl":"10.1134/S1547477124702145","url":null,"abstract":"<p>New evidence for the dominance of the Balitsky–Fadin–Kuraev–Lipatov (BFKL) evolution effects is obtained by comparison of the calculation of Meueller–Navelet (MN) dijet production cross section in the next-to-leading logarithmic approximation of the BFKL evolution with the recent CMS measurement at the LHC at 2.76 TeV. Here the MN dijet is the maximally separated in rapidity pair of jets with both jets taken among jets with transverse momentum above some chosen <span>({{p}_{{ bot min }}})</span> in an event. Unlike the large-angle scattering Gribov–Lipatov–Altarelli–Parisi–Dokshitzer (GLAPD) evolution, the small-angle scattering BFKL evolution for is the dominant high-energy asymptotic regime of QCD.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"224 - 228"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865438","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
Current Status of the Odderon Odderon的当前状态
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702078
M. G. Ryskin
{"title":"Current Status of the Odderon","authors":"M. G. Ryskin","doi":"10.1134/S1547477124702078","DOIUrl":"10.1134/S1547477124702078","url":null,"abstract":"<p>Odderon is the C-odd amplitude which does not die out (or dies very slowly) with energy. We consider the constrains on the Odderon properties and the perturbative QCD Odderon given at the lowest <span>({{alpha }_{s}})</span> order by the three gluon exchange. Then we discuss the experimental indications for the Odderon contribution to high energy proton-proton elastic scattering and some other processes in which the Odderon may reveal itself.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"187 - 190"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865566","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
Recent Results on Proton and Light Nuclei (d, t) Production from the BM@N Experiment at NICA NICA BM@N实验中质子和轻核产生的最新结果（d, t）
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701929
V. Kolesnikov, M. Kapishin, L. Kovachev
{"title":"Recent Results on Proton and Light Nuclei (d, t) Production from the BM@N Experiment at NICA","authors":"V. Kolesnikov,&nbsp;M. Kapishin,&nbsp;L. Kovachev","doi":"10.1134/S1547477124701929","DOIUrl":"10.1134/S1547477124701929","url":null,"abstract":"<p>This work presents the recent results on the production of protons, deuterons and tritons from the BM@N experiment at the NICA accelerator complex. Transverse momentum spectra and rapidity distributions of <span>(p)</span>, <span>(d)</span>, <span>(t)</span> are measured in centrality selected Ar + nucleus collisions at the beam kinetic energy of 3.2 GeV per nucleon. The system size dependence of the baryon rapidity loss is presented. The deuteron-to-proton ratio as a function of the center-of-mass rapidity is obtained in various reaction systems. The target mass dependence of the entropy per baryon <span>({S mathord{left/ {vphantom {S A}} right. kern-0em} A})</span> is studied and the energy dependence for <span>({S mathord{left/ {vphantom {S A}} right. kern-0em} A})</span> is addressed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"105 - 111"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865430","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 Bjorken Sum Rule: Heavy Quarks and Analytic QCD 比约肯求和规则：重夸克与解析 QCD
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701991
I. R. Gabdrakhmanov, N. A Gramotkov, A. V. Kotikov, O. V. Teryaev, D. A. Volkova, I. A. Zemlyakov
{"title":"On Bjorken Sum Rule: Heavy Quarks and Analytic QCD","authors":"I. R. Gabdrakhmanov,&nbsp;N. A Gramotkov,&nbsp;A. V. Kotikov,&nbsp;O. V. Teryaev,&nbsp;D. A. Volkova,&nbsp;I. A. Zemlyakov","doi":"10.1134/S1547477124701991","DOIUrl":"10.1134/S1547477124701991","url":null,"abstract":"<p>We present the results of [1], where good agreement was obtained between calculations within the framework of analytic QCD and experimental data on polarized Bjorken sum rule. The heavy quark contributions are taken into account.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"146 - 150"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865531","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
Feasibility Study for Resonance Reconstruction in Bi + Bi Collisions at (sqrt {{{s}_{{NN}}}} ) = 9.2 GeV in the MPD Detector at NICA NICA MPD探测器(sqrt {{{s}_{{NN}}}} ) = 9.2 GeV下Bi + Bi碰撞共振重建的可行性研究
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702054
Ya. A. Berdnikov, D. A. Ivanishchev, D. O. Kotov, M. V. Malaev, A. Yu. Riabov
{"title":"Feasibility Study for Resonance Reconstruction in Bi + Bi Collisions at (sqrt {{{s}_{{NN}}}} ) = 9.2 GeV in the MPD Detector at NICA","authors":"Ya. A. Berdnikov,&nbsp;D. A. Ivanishchev,&nbsp;D. O. Kotov,&nbsp;M. V. Malaev,&nbsp;A. Yu. Riabov","doi":"10.1134/S1547477124702054","DOIUrl":"10.1134/S1547477124702054","url":null,"abstract":"<p>—We present transverse momentum and centrality dependent results of feasibility studies for measurement of production of <span>(phi (1020))</span>, <span>(rho {{(770)}^{0}},)</span> and <span>(K{text{*}}{{(892)}^{0}})</span> resonances in Bi + Bi collisions at <span>(sqrt {{{s}_{{NN}}}} )</span> = 9.2 GeV using the MPD detector at NICA collider in this article. Results are obtained using full-scale Monte Carlo simulations of heavy-ion collisions and the experimental apparatus.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"175 - 180"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865564","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
The Role of the Intrinsic-kT and Soft Gluon Contributions in Drell–Yan Production 内在kt和软胶子在钻岩生产中的作用
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702017
N. Raičević
{"title":"The Role of the Intrinsic-kT and Soft Gluon Contributions in Drell–Yan Production","authors":"N. Raičević","doi":"10.1134/S1547477124702017","DOIUrl":"10.1134/S1547477124702017","url":null,"abstract":"<p>A review of the most recent results on determination of parton internal transverse momentum in initial colliding hadron obtained within the Parton Branching Method is presented and its interplay with non-perturbative soft gluon contribution in Drell–Yan pairs production is discussed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"156 - 160"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865568","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
Horizon Thermodynamics on Nice Slices of the Causal Diamond 因果钻石漂亮切片上的地平线热力学
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S154747712470198X
I. Nagle
{"title":"Horizon Thermodynamics on Nice Slices of the Causal Diamond","authors":"I. Nagle","doi":"10.1134/S154747712470198X","DOIUrl":"10.1134/S154747712470198X","url":null,"abstract":"<p>There is a deep link between gravity and thermodynamics; in a precise way gravity can be derived from entanglement entropy in conformal field theories. However, this depends crucially on properties of horizons, and asymptotic symmetries of phase space. To explore how this relation behaves under dynamical processes, we consider covariant gravitational phase space enhanced with bulk conformal symmetry. As is well known, the Noether–Wald entropy has an explicit form in terms of the Abbott–Deser–Tekin conserved surface charges of gauge theories. We find a new vector contribution to the Abbott–Deser–Tekin charges that arises for conformal symmetries. In applying this to the causal diamond, we derive a general relation for surface gravity, based on the conformal invariance of horizons, that allows us to find slices where the zeroth law holds, as well as the degree to which a first law arises on the phase space.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"142 - 145"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865532","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
Probing Collectivity in String Models via Machine Learning 通过机器学习探究字符串模型的集合性
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701899
E. Andronov
{"title":"Probing Collectivity in String Models via Machine Learning","authors":"E. Andronov","doi":"10.1134/S1547477124701899","DOIUrl":"10.1134/S1547477124701899","url":null,"abstract":"<p>This work is devoted to studying the potential of machine learning techniques in relativistic nuclear physics for distinguishing between various physical theories and, consequently, gaining a deeper comprehension of the underlying physical processes in ultra-relativistic nuclear collisions. Recent findings on the modeling of <i>p</i> + <i>p</i> and <i>A</i> + <i>A</i> interactions within the framework of the color string fusion model suggest that it is feasible to describe the experimentally observed event-by-event azimuthal asymmetry in a unified manner across various colliding systems. Such a description has become possible by considering two mechanisms of string interaction: (1) changes in the magnitude of the colour field in the region of string overlap in the transverse collision plane (2) Lorentz boosts applied to particles emerging as a result of string motion due to their mutual attraction. We demonstrate that it is feasible to train machine learning algorithms using <span>({{p}_{{text{T}}}})</span>–<span>(phi )</span> distributions from event-by-event data to distinguish between the proposed sources of collective behaviour.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"90 - 94"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865534","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
Z Boson Decay into Two Leptons and Photon, Charge Asymmetry and Running Weak Mixing Angle Z玻色子衰变成两个轻子和光子，电荷不对称和运行弱混合角
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702042
A. G. Kharlamov, T. A. Kharlamova, V. N. Zhabin, A. S. Kupich
{"title":"Z Boson Decay into Two Leptons and Photon, Charge Asymmetry and Running Weak Mixing Angle","authors":"A. G. Kharlamov,&nbsp;T. A. Kharlamova,&nbsp;V. N. Zhabin,&nbsp;A. S. Kupich","doi":"10.1134/S1547477124702042","DOIUrl":"10.1134/S1547477124702042","url":null,"abstract":"<p>In this paper, we consider the lepton and photon invariant mass distribution in the Z boson decay into two leptons and photon. The measurements were performed with the ATLAS detector and have best accuracy today, the systematic uncertainty does not exceed 0.6%. Quantitative comparison of the measurement results with the predictions of modern event generators implementing the calculation of the Standard Model for this process was performed. The discovered deviations from the predictions of the generators are interpreted using the effective interaction of the Z boson with two leptons and photon. The addition of the effective interaction contribution turned out to be significant at the confidence level of <span>( &gt; ,5sigma )</span> for PowHeg + PHOTOS and <span>( &gt; ,4.7sigma )</span> for Sherpa 2.2. The charge asymmetry for this process was calculated at different values of the Weinberg angle sine. The asymmetry reaches a maximum and minimum at sine values of about 0.2 and 0.7, respectively. Numerically, the asymmetry is 0.03 at maximum and –0.03 at minimum, which does not allow one to explain the experimental value of the asymmetry of <span>(0.088 pm 0.022)</span> at lepton and photon invariant mass equal to the W boson mass.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"171 - 174"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865563","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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