arXiv - PHYS - Nuclear Theory最新文献_第10页

Towards scalable bound-to-resonance extrapolations for few- and many-body systems 实现少体和多体系统的可扩展边界共振外推法

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-04 DOI: arxiv-2409.03116

Nuwan Yapa, Sebastian König, Kévin Fossez

引用次数: 0

Three-body model of $^{6}$He with non-local halo effective field theory potentials 具有非局部晕有效场论势能的 $^{6}$He 三体模型

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-04 DOI: arxiv-2409.03074

E. C. Pinilla, W. Leidemann, G. Orlandini, P. Descouvemont

引用次数: 0

Deciphering the influence of neutron transfer in Si-based fusion reactions around the Coulomb barrier 解读库仑势垒附近硅基聚变反应中中子转移的影响

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-04 DOI: arxiv-2409.03101

Rinku Prajapat

{"title":"Deciphering the influence of neutron transfer in Si-based fusion reactions around the Coulomb barrier","authors":"Rinku Prajapat","doi":"arxiv-2409.03101","DOIUrl":"https://doi.org/arxiv-2409.03101","url":null,"abstract":"Purpose: We aim to investigate the role of a few neutron transfer channels on\u0000the dynamics of fusion reactions around the Coulomb barrier by judicially\u0000selecting 11 different $^{28,30}$Si-induced systems. These reactions are chosen\u0000in such a way that they possess positive and negative Q-values for neutron\u0000transfer channels to make the comparison more apparent. Furthermore, a\u0000comparative study on fusion barrier parameters using different proximity\u0000potentials and parametrizations is also a prime goal. Method: A channel coupling approach within the framework of a semiclassical\u0000model is being used to investigate the role of multi-neutron transfer with\u0000positive Q-values on fusion phenomena near and below the Coulomb barrier. The\u0000fusion barrier parameters have been extracted and analyzed within the framework\u0000of seven different potential models. Results: The sub-barrier fusion enhancement compared to the one-dimensional\u0000barrier penetration model (uncoupled) is investigated by considering collective\u0000excitations in colliding nuclei and multi-neutron transfer channels with Q $>$\u00000 within the channel coupling model. Furthermore, GRAZING calculations are\u0000performed to predict the cross-section of target-like fragments after 2n pickup\u0000transfer. Conclusion: All the fusion excitation functions (EFs) have been successfully\u0000explained by the coupled channel calculations using the channel coupling model.\u0000Only the significant effect of up to 2n pickup transfer with Q $>$ 0 was found\u0000on sub-barrier fusion. Despite having positive Q values for transfer channels,\u0000no noticeable impact of more than 2n transfer was observed. GRAZING predictions\u0000are grossly in the same order as the quantitative contribution of 2n transfer\u0000channels observed by channel coupling model calculations.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206552","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

Speed of sound and isothermal compressibility in a magnetized quark matter with anomalous magnetic moment of quarks 具有反常夸克磁矩的磁化夸克物质的声速和等温压缩性

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-08 DOI: arxiv-2408.04398

Rajkumar Mondal, Sourav Duari, Nilanjan Chaudhuri, Sourav Sarkar, Pradip Roy

{"title":"Speed of sound and isothermal compressibility in a magnetized quark matter with anomalous magnetic moment of quarks","authors":"Rajkumar Mondal, Sourav Duari, Nilanjan Chaudhuri, Sourav Sarkar, Pradip Roy","doi":"arxiv-2408.04398","DOIUrl":"https://doi.org/arxiv-2408.04398","url":null,"abstract":"We study the characteristics of quark matter under the influence of a\u0000background magnetic field with anomalous magnetic moment (AMM) of quarks at\u0000finite temperature and quark chemical potential in the framework of Polyakov\u0000loop extended Nambu Jona-Lasinio (PNJL) model. In presence of a magnetic field,\u0000the speed of sound and isothermal compressibility become anisotropic with\u0000respect to the direction of the background magnetic field, splitting into\u0000parallel and perpendicular directions with respect to the magnetic field.\u0000Though the qualitative nature of parallel and perpendicular components of\u0000squared speed of sound appear similar, they differ in magnitude at lower values\u0000of temperature. The parallel and perpendicular components of isothermal\u0000compressibility decrease with increasing temperature, indicating a trend\u0000towards increased incompressible strongly interacting matter. On inclusion of\u0000the AMM of quarks, the perpendicular component of isothermal compressibility\u0000becomes greater than the parallel component. Additionally, we investigate the\u0000quark number susceptibility normalized by its value at zero magnetic field,\u0000which may indicate the presence of magnetic fields in the system.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934711","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

Charmed hypernuclei within density-dependent relativistic mean-field theory 密度依赖相对论均场理论中的魅惑超核

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-08 DOI: arxiv-2408.04527

Wei Yang, Shi Yuan Ding, Bao Yuan Sun

{"title":"Charmed hypernuclei within density-dependent relativistic mean-field theory","authors":"Wei Yang, Shi Yuan Ding, Bao Yuan Sun","doi":"arxiv-2408.04527","DOIUrl":"https://doi.org/arxiv-2408.04527","url":null,"abstract":"The charmed $ Lambda_{c}^{+} $ hypernuclei are investigated within the\u0000framework of the density-dependent relativistic mean-field (DDRMF) theory.\u0000Starting from the empirical hyperon potential in symmetric nuclear matter,\u0000obtained through microscopic first-principle calculations, two sets of\u0000$Lambda_c N$ effective interactions were derived by fitting the potentials\u0000with minimal uncertainty (Fermi momentum $k_{F,n} = 1.05~rm{fm}^{-1}$) and\u0000near saturation density ($k_{F,n} = 1.35~rm{fm}^{-1}$). These DDRMF models\u0000were then used to explore the $Lambda_{c} N$ effective interaction\u0000uncertainties on the description of hypernuclear bulk and single-particle\u0000properties. A systematic investigation was conducted on the existence of bound\u0000$Lambda_{c}^{+}$ hypernuclei. The dominant factors affecting the existence and\u0000stability of hypernuclei were analyzed from the perspective of the\u0000$Lambda_{c}^{+}$ potential. It is found that the hyperon potential is not only\u0000influenced by the Coulomb repulsion, but by an extra contribution from the\u0000rearrangement terms due to the density dependence of the meson-baryon coupling\u0000strengths. Therefore, the rearrangement term significantly impacts the\u0000stability description for light hypernuclei, while for heavier hypernuclei, the\u0000contribution from Coulomb repulsion becomes increasingly significant and\u0000eventually dominant. The discussion then delves into the bulk and\u0000single-particle properties of charmed hypernuclei using these models. It is\u0000found that even when different models yield similar hyperon potentials for\u0000nuclear matter, different treatments of nuclear medium effects could lead to\u0000disparities in the theoretical description of hypernuclear structures. This\u0000study indicates that constraints on the $ Lambda_{c} N $ interaction at finite\u0000densities are crucial for the study of $ Lambda_{c}^{+} $ hypernuclear\u0000structures.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934710","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

Spin polarization of $Λ$ hyperons along beam direction in p+Pb collisions at $sqrt{s_{NN}}=8.16$ TeV using hydrodynamic approaches 在 $sqrt{s_{NN}}=8.16$ TeV 的 p+Pb 对撞中，采用流体力学方法使Λ$超子沿束流方向发生自旋极化

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-08 DOI: arxiv-2408.04296

Cong Yi, Xiang-Yu Wu, Jie Zhu, Shi Pu, Guang-You Qin

{"title":"Spin polarization of $Λ$ hyperons along beam direction in p+Pb collisions at $sqrt{s_{NN}}=8.16$ TeV using hydrodynamic approaches","authors":"Cong Yi, Xiang-Yu Wu, Jie Zhu, Shi Pu, Guang-You Qin","doi":"arxiv-2408.04296","DOIUrl":"https://doi.org/arxiv-2408.04296","url":null,"abstract":"We have implemented the 3+1 dimensional CLVisc hydrodynamics model with\u0000TRENTO-3D initial conditions to investigate the spin polarization of $Lambda$\u0000hyperons along the beam direction in p+Pb collisions at $sqrt{s_{NN}} = 8.16$\u0000TeV. Following our previous theoretical framework based on quantum kinetic\u0000theory, we consider three different scenarios: $Lambda$ equilibrium, $s$ quark\u0000equilibrium, and iso-thermal equilibrium scenarios. We have computed the second\u0000Fourier sine coefficients of spin polarization along the beam direction,\u0000denoted as $leftlangle P_{z} sin 2(phi_{p} - Psi_{2}) rightrangle$, with\u0000$phi_p$ being the azimuthal angle relative to the second-order event plane\u0000$Psi_{2}$, as functions of multiplicity and transverse momentum in the three\u0000scenarios. Additionally, we have also computed the spin polarization along the\u0000beam direction, $P_{z}$, as a function of the azimuthal angle. We find that the\u0000spin polarization induced by thermal vorticity always provides an opposite\u0000contribution compared to the shear-induced polarization in p+Pb collisions. The\u0000total spin polarization computed by the current hydrodynamic model disagrees\u0000with the data measured by LHC-CMS experiments. Our findings imply that other\u0000non-flow effects may play a crucial role in p+Pb collisions.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934712","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

Photonuclear reactions on $^{59}$Co at bremsstrahlung end-point energies of 40-130 MeV 轫致辐射端点能量为 40-130 兆电子伏的 $^{59}$Co 上的光核反应

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-08 DOI: arxiv-2408.04252

F. A. Rasulova, S. S. Belyshev, M. A. Demichev, D. L. Demin, S. A. Evseev, N. Yu. Fursova, M. I. Gostkin, J. H. Khushvaktov, V. V. Kobets, A. A. Kuznetsov, S. V. Rozov, E. T. Ruziev, A. A. Solnyshkin, T. N. Tran, E. A. Yakushev, B. S. Yuldashev

引用次数: 0

Convergence properties of $T'$-Expansion Scheme: Hadron Resonance Gas and Cluster Expansion Model T'$膨胀方案的收敛特性：强子共振气体和簇膨胀模型

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-08 DOI: arxiv-2408.04588

Micheal Kahangirwe, Irene Gonzalez, Jorge A. Muñoz, Claudia Ratti, Volodymyr Vovchenko

{"title":"Convergence properties of $T'$-Expansion Scheme: Hadron Resonance Gas and Cluster Expansion Model","authors":"Micheal Kahangirwe, Irene Gonzalez, Jorge A. Muñoz, Claudia Ratti, Volodymyr Vovchenko","doi":"arxiv-2408.04588","DOIUrl":"https://doi.org/arxiv-2408.04588","url":null,"abstract":"In this study, we assess the effectiveness and robustness of the recently\u0000proposed $T'$-expansion scheme for expanding the equation of state of strongly\u0000interacting matter to finite density, by comparing its performance relative to\u0000the conventional Taylor expansion method in various effective QCD models. We\u0000use baryon number density and its susceptibilities to calculate the expansion\u0000coefficients in the $T'$-expansion scheme with and without the Stefan-Boltzmann\u0000limit correction. Our methodology involves comparing truncation orders to exact\u0000solutions to assess the scheme's accuracy. We utilize Ideal, Excluded Volume,\u0000and van der Waals formulations of the Hadron Resonance Gas (HRG) model at low\u0000temperatures, and the Cluster Expansion Model at higher temperatures. Our\u0000findings indicate that the $T'$-expansion scheme offers superior convergence\u0000properties near and above the chiral crossover temperature, where the\u0000chiral-criticality-inspired scaling $(partial/ partial T)_{mu_B} sim\u0000(partial^2/partial mu_B^2)_T$ holds. However, it shows limited improvement\u0000in the HRG models, indicating that it may not be the most suitable choice for\u0000describing the hadronic phase.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934708","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 Wood-Saxon proton optical potential for p-nuclei 对核的伍德-撒克逊质子光势

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-07 DOI: arxiv-2408.03697

Sukhendu Saha, Dipali Basak, Chinmay Basu

引用次数: 0

How the Contact Can Produce Snowballs from Hell 接触如何产生地狱雪球

arXiv - PHYS - Nuclear Theory Pub Date : 2024-08-07 DOI: arxiv-2408.03935

Eric Braaten, Kevin Ingles, Justin Pickett

引用次数: 0