Nuclear Physics A最新文献

{"title":"Coherent photoproduction of light vector mesons off nuclear targets in the dipole picture","authors":"Cheryl Henkels ,&nbsp;Emmanuel G. de Oliveira ,&nbsp;Roman Pasechnik ,&nbsp;Haimon Trebien","doi":"10.1016/j.nuclphysa.2025.123018","DOIUrl":"10.1016/j.nuclphysa.2025.123018","url":null,"abstract":"<div><div>We study the coherent photoproduction of light vector mesons in Pb-Pb collisions in the framework of color dipole approach. We employ the Glauber–Gribov formalism supplemented by an effective suppression factor <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>G</mi></mrow></msub></math></span> accounting for the gluon shadowing correction. We adjust the latter to reproduce the deep inelastic structure function <span><math><msub><mrow><mi>F</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> (E665) and <em>ρ</em> meson photoproduction (ALICE) data. We achieve a good description of the available data points with <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>=</mo><mn>0.85</mn></math></span> at scale <span><math><msubsup><mrow><mi>M</mi></mrow><mrow><mi>ρ</mi></mrow><mrow><mn>2</mn></mrow></msubsup><mo>/</mo><mn>4</mn><mo>=</mo><mn>0.15</mn></math></span> GeV². In addition, employing this suppression factor, we present predictions for coherent <span><math><mi>ρ</mi><mo>(</mo><mn>2</mn><mi>S</mi><mo>)</mo></math></span>, <span><math><mi>ω</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>,</mo><mn>2</mn><mi>S</mi><mo>)</mo></math></span> and <span><math><mi>ϕ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>,</mo><mn>2</mn><mi>S</mi><mo>)</mo></math></span> photoproduction observables using the holographic vector meson wave functions.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123018"},"PeriodicalIF":1.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153614","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}

{"title":"Asymmetric to symmetric fission transition in 180Hg⁎: Effects of excitation energy and angular momentum","authors":"Dalip Singh Verma,&nbsp;Pooja Chauhan,&nbsp;Vivek","doi":"10.1016/j.nuclphysa.2025.123017","DOIUrl":"10.1016/j.nuclphysa.2025.123017","url":null,"abstract":"<div><div>The transition from asymmetric to symmetric fission in the ¹⁸⁰Hg^⁎ nucleus, formed in the ³⁶Ar + ¹⁴⁴Sm reaction, as a function of excitation energy and angular momentum has been investigated. Using the dynamical cluster-decay model, the fragmentation potential, preformation probability, and cross-sections have been analyzed for asymmetric (80, 100) and symmetric (90, 90) mass fission channels, considering both the optimum hot and cold orientations of the fragments, as well as the case of symmetric mass fission channel with fragments assumed to be spherical. The calculations reveal that deformed proton and neutron shell closures favour asymmetric fission at lower excitation energies, while a transition to symmetric fission occurs near 40 MeV of excitation energy due to changes in fragment deformation with excitation energy. These findings are consistent with the available experimental observations and theoretical predictions. The transition also occurs with increasing angular momentum, but only for optimum hot orientations.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123017"},"PeriodicalIF":1.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154198","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}

{"title":"Implementing the hardcore concept in the mean field of the Tamm-Dancoff approximation","authors":"Hadi Sobhani,&nbsp;Yan-An Luo","doi":"10.1016/j.nuclphysa.2024.123011","DOIUrl":"10.1016/j.nuclphysa.2024.123011","url":null,"abstract":"<div><div>This paper investigates one of the most prominent models in nuclear physics, the Tamm-Dancoff approximation (TDA), for particle-hole excitations. We demonstrate how to incorporate one of the most challenging aspects of nuclear physics, the hardcore, into this model. Following an introduction to the concept and the corresponding mathematical tools, we examine the sample nuclei ¹⁶O and ⁴⁰Ca. A portion of the excitation spectra of these nuclei is reproduced, and the octupole transition in these nuclei along with the TDA sum rule is investigated. The results are calculated and compared in both the well-known version and the new approach. In all cases, the new model exhibits better agreement with experimental data than the well-known model, which employed the harmonic oscillator basis.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123011"},"PeriodicalIF":1.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153569","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}

{"title":"Study of possible antimagnetic rotation in 100Ru","authors":"Pooja Chauhan ,&nbsp;S. Sihotra ,&nbsp;Renu Joshi ,&nbsp;Dalip Singh Verma ,&nbsp;R.P. Singh ,&nbsp;R. Palit ,&nbsp;D. Mehta","doi":"10.1016/j.nuclphysa.2025.123016","DOIUrl":"10.1016/j.nuclphysa.2025.123016","url":null,"abstract":"<div><div>The study of possibility of antimagnetic rotation in ¹⁰⁰Ru is studied on the basis of semiclassical particle-rotor model (SCM). In the high spin range 18⁺ to 28⁺, the dynamic moment of inertia <span><math><msup><mrow><mo>ℑ</mo></mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msup></math></span> falls within the typical range of antimagnetic rotation. The decrease in calculated transition probability B(E2) values with an increase in spin, and a sharp increase in the ratio of observed <span><math><msup><mrow><mo>ℑ</mo></mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msup></math></span> and calculated B(E2) values with spin shows the possible antimagnetic rotation character. Additionally, the calculated spin (<em>ħ</em>) versus frequency (MeV) plot of configuration <span><math><mi>π</mi><msup><mrow><mo>(</mo><msub><mrow><mi>g</mi></mrow><mrow><mn>9</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>)</mo></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></math></span> ⊗ <span><math><mi>ν</mi><mo>[</mo><msubsup><mrow><mi>h</mi></mrow><mrow><mn>11</mn><mo>/</mo><mn>2</mn></mrow><mrow><mn>2</mn></mrow></msubsup><mspace></mspace><msup><mrow><mo>(</mo><msub><mrow><mi>g</mi></mrow><mrow><mn>7</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>)</mo></mrow><mrow><mn>2</mn></mrow></msup><mo>]</mo></math></span>, which is comparable with experimental values supports the possibility of the AMR phenomenon in the positive parity band of ¹⁰⁰Ru.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123016"},"PeriodicalIF":1.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153568","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}

{"title":"The apparent U(5) to near O(6) shape evolution in even-even 152→162Dy inside the symmetry triangle","authors":"A. Obaid,&nbsp;A.M. Khalaf,&nbsp;M. Kotb,&nbsp;H.A. Ghanem","doi":"10.1016/j.nuclphysa.2025.123015","DOIUrl":"10.1016/j.nuclphysa.2025.123015","url":null,"abstract":"<div><div>In this article, we showed that even-even <span><math><mi>A</mi><mo>=</mo><mn>152</mn><mo>⟶</mo><mn>162</mn></math></span> Dysprosium isotopic chain follows a specific trajectory of evolution that appear to be from U(5) to near O(6) vertex inside the symmetry triangle. The analysis was done using the Extended Consistent Q formalism (ECQF) of the interacting boson model, and catastrophe theory. We determined the Hamiltonian parameters using the method of orthogonal crossing contours for key observables. The Potential Energy Surfaces (PES's) for each isotope was also obtained using the intrinsic coherent state formalism. The path of evolution for the chain showed the same trend-line in both the symmetry triangle and the separatrix plane of catastrophe theory. We also showed that despite being located near the O(6) limit in the symmetry triangle, neutron-rich Dy isotopes still exhibit the behaviour of good axially symmetric rotors but with a reduced gamma rigidity, and this apparent location is due to the non linearity of scales for observables inside the symmetry triangle.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123015"},"PeriodicalIF":1.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153590","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}

{"title":"A potential model study of the nucleon's charge and mass radius","authors":"Daniel Gallimore,&nbsp;Jinfeng Liao","doi":"10.1016/j.nuclphysa.2024.123012","DOIUrl":"10.1016/j.nuclphysa.2024.123012","url":null,"abstract":"<div><div>We study the charge and mass distributions within a nucleon and compute the associated squared radii based on a potential model approach. Different constituent quark configurations such as Δ, <em>Y</em>, and quark-diquark are considered and compared, with model parameters calibrated by experimental measurements of the proton and neutron charge radius. The results suggest that while the charge radius is dictated by quark dynamics, the mass radius is strongly influenced by nonperturbative QCD contributions to a nucleon's mass that are not sensitive to the constituent quarks. As a result, the mass radius could become substantially different from the charge radius. The obtained nucleon mass distributions of different configurations are further used for simulations of the initial conditions in heavy ion collisions. The computed eccentricities <span><math><msub><mrow><mi>ε</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> and <span><math><msub><mrow><mi>ε</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> are found to demonstrate a considerable sensitivity to the input nucleon profiles, especially to the mass radius in the peripheral region as well as for systems with fewer participants.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123012"},"PeriodicalIF":1.7,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153609","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}

{"title":"Elastic scattering analysis of α+28Si using energy density functional","authors":"Ahmed Hammad Amer ,&nbsp;Zakaria M.M. Mahmoud ,&nbsp;M.N. El-Hammamy","doi":"10.1016/j.nuclphysa.2024.123013","DOIUrl":"10.1016/j.nuclphysa.2024.123013","url":null,"abstract":"<div><div>In this work, we use the energy density functional (EDF) to study <em>α</em>-clustering and <em>α</em>-scattering from ²⁸Si. With the help of the convolution theorem, the <em>α</em>-cluster density distribution inside the ²⁸Si nucleus is determined by minimizing EDF. The single and double folding models use the obtained cluster density to get <em>α</em>+²⁸Si real part of the optical model potential. The <em>α</em>+²⁴Mg cluster structure is used as an alternative cluster configuration for ²⁸Si in order to create the real cluster folding potential and validate the EDF model. For the imaginary part, we use either the Woods-Saxon (WS) or square Woods-Saxon (WS²) forms. Furthermore, the WS² phenomenological potential is used for comparison. Our analysis shows that the current <em>α</em>-cluster model successfully reproduces the experimental data from <em>α</em>+²⁸Si elastic scattering, nearly identical to the cluster folding potential generated using the <em>α</em>+²⁴Mg cluster structure. The models implemented did not yield successful results for all experimental data at energies below 50 MeV, which is consistent with previously proposed theoretical models and methods. Moreover, these models demonstrate considerable success at energies exceeding 100 MeV. Therefore, the EDF can be employed to study the ground-state <em>α</em>-cluster of the ²⁸Si nucleus.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123013"},"PeriodicalIF":1.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153589","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}

{"title":"QCD condensates and αs from τ-decay","authors":"Stephan Narison","doi":"10.1016/j.nuclphysa.2024.123014","DOIUrl":"10.1016/j.nuclphysa.2024.123014","url":null,"abstract":"&lt;div&gt;&lt;div&gt;We improve the determinations of the QCD condensates within the SVZ expansion in the axial-vector (A) channel using the ratio of Laplace sum rule (LSR) &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;τ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; within stability criteria and &lt;em&gt;τ&lt;/em&gt;-like higher moments &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; within stability for arbitrary &lt;em&gt;τ&lt;/em&gt;-mass squared &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;. We find the same violation of the factorization by a factor 6 of the four-quark condensate as from &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; Hadrons data. One can notice a systematic alternate sign and no exponential growth of the size of these condensates. Then, we extract &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; from the lowest &lt;em&gt;τ&lt;/em&gt;-decay like moment. We obtain to order &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt; the conservative value from the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;-stability until &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;τ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;: &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;τ&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0.3178&lt;/mn&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;66&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; (FO) and 0.3380 (44) (CI) leading to: &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;Z&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0.1182&lt;/mn&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;8&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; (FO) and &lt;span&gt;&lt;math&gt;&lt;mn&gt;0.1206&lt;/mn&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; (CI). We extend the analysis to the V–A channel and find: &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;τ&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0.3135&lt;/mn&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;83&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; (FO) and 0.3322 (81) (CI) leading to: &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123014"},"PeriodicalIF":1.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153616","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}

{"title":"Relativistic insights into singly heavy baryons: Excitation, decays and magnetic moments","authors":"Krishna Patel ,&nbsp;Rahulbhai Mistry ,&nbsp;Ajay Majethiya","doi":"10.1016/j.nuclphysa.2024.123010","DOIUrl":"10.1016/j.nuclphysa.2024.123010","url":null,"abstract":"<div><div>In this article, we investigate the mass spectra and Regge trajectories of singly heavy baryons in the framework of the Relativistic Dirac formalism, incorporating a non-Coulombic linear potential. We have included spin-spin, spin-orbit and spin-tensor interactions to predict the masses of Λ<em>c</em>, Σ<em>c</em>, Ξ<em>c</em> and Ω<em>c</em> baryons for both radial and orbital excitations. Our calculated masses are utilized to construct the Regge trajectories of Λ<em>c</em>, Σ<em>c</em>, Ξ<em>c</em> and Ω<em>c</em> in both the <span><math><mo>(</mo><mi>J</mi><mo>,</mo><msup><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></math></span> and <span><math><mo>(</mo><msub><mrow><mi>n</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>,</mo><msup><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></math></span> planes. Moreover, the strong decay widths and electromagnetic properties such as magnetic moments, transition magnetic moments and radiative decay widths are determined for the ground state of these baryons. We compare our results with other theoretical predictions and experimental observations. Our results closely align with both theoretical predictions and available experimental results.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123010"},"PeriodicalIF":1.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153615","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}

{"title":"Far-from-equilibrium attractors in kinetic theory for a mixture of quark and gluon fluids","authors":"Ferdinando Frascà ,&nbsp;Andrea Beraudo ,&nbsp;Michael Strickland","doi":"10.1016/j.nuclphysa.2024.123008","DOIUrl":"10.1016/j.nuclphysa.2024.123008","url":null,"abstract":"<div><div>We exactly solve an RTA-Boltzmann equation that describes the dynamics of coupled massless quark and gluon fluids undergoing transversally homogeneous longitudinal boost-invariant expansion. We include a fugacity parameter that allows quarks to be out of chemical equilibrium and we account for the different collision rates of quarks and gluons, which are related by Casimir scaling. Based on these assumptions, we numerically determine the evolution of a large set of moments of the quark and gluon distribution functions and reconstruct their entire distribution functions. We find that both late and early-time attractors exist for all moments of the distribution functions containing more than one power of the squared longitudinal momentum. These attractors emerge long before the system reaches the regime where hydrodynamic approximations apply. In addition, we discuss how the shear viscous corrections and entropy density of the fluid mixture evolve and consider the properties of their respective attractors. Finally, the entropy production is also investigated for different initial values of momentum anisotropy and quark abundance.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1055 ","pages":"Article 123008"},"PeriodicalIF":1.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}