arXiv - PHYS - Nuclear Theory最新文献_第5页

Neutron skin and its effects in heavy-ion collisions 中子表皮及其在重离子碰撞中的影响

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07059

Meng-Qi Ding, De-Qing Fang, Yu-Gang Ma

{"title":"Neutron skin and its effects in heavy-ion collisions","authors":"Meng-Qi Ding, De-Qing Fang, Yu-Gang Ma","doi":"arxiv-2409.07059","DOIUrl":"https://doi.org/arxiv-2409.07059","url":null,"abstract":"Neutron skin is an exotic phenomena in unstable nuclei. The various effects\u0000in nuclear reactions caused by the neutron skin and also its relation with the\u0000properties of nuclear structure are reviewed in this article. Based on numerous\u0000studies with theoretical models, strong correlations have been found between\u0000the neutron skin thickness and neutron removal cross section, neutron/proton\u0000yield ratio, t/ch{^3He} yield ratio, neutron-proton momentum difference,\u0000isoscaling parameter, photon production, reaction cross sections for neutron\u0000induced reactions, charge-changing cross sections difference of mirror nuclei,\u0000astrophysical $S$-factor, and other quantities in nuclear reactions induced by\u0000neutron-rich nuclei. Moreover, the relationships between neutron skin thickness\u0000and some properties of nuclear structure, such as $alpha$-cluster formation,\u0000$alpha$ decay, nuclear surface, nuclear temperature, and proton radii\u0000difference of mirror nuclei, have also been investigated. It also has been\u0000shown that the neutron skin plays a crucial role in relativistic heavy-ion\u0000collisions. Experimentally, an unstable nucleus with neutron skin can be\u0000generated by radioactive nuclear beam facilities, and the thickness of neutron\u0000skin could be extracted by measuring the sensitive probes, which further helps\u0000giving stringent constraints on the equation of state of asymmetric nuclear\u0000matter and properties of neutron stars.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206808","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

Anisotropic linear waves and breakdown of the momentum expansion in spin magnetohydrodynamics 自旋磁流体力学中的各向异性线性波和动量扩展的崩溃

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07096

Zhe Fang, Koichi Hattori, Jin Hu

{"title":"Anisotropic linear waves and breakdown of the momentum expansion in spin magnetohydrodynamics","authors":"Zhe Fang, Koichi Hattori, Jin Hu","doi":"arxiv-2409.07096","DOIUrl":"https://doi.org/arxiv-2409.07096","url":null,"abstract":"We formulate spin magnetohydrodynamics (MHD) by including the magnetic-flux\u0000and total angular momentum conservation laws in the hydrodynamic framework. To\u0000specify the local angular momentum conservation, we choose the totally\u0000antisymmetric spin current. The entropy-current analysis allows for ten\u0000dissipative first-order transport coefficients including anisotropic spin\u0000relaxation rates and the conversion rate between a vorticity (shear) to a\u0000symmetric stress (antisymmetric torque). By employing the linear-mode analysis,\u0000we solve the first-order spin MHD equations to determine the dispersion\u0000relations with the complete information of anisotropy retained. Our analytic\u0000solutions indicate that the small-momentum expansion is spoiled by blow up of\u0000the higher-order terms when the angle between the momentum and the magnetic\u0000field approaches the right angle. This also reveals the existence of another\u0000expansion parameter, and, in light of it, we provide solutions in an\u0000alternative series expression beyond the critical angle. We confirm that these\u0000two series expansions work well in the appropriate angle ranges as compared\u0000with numerical results.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206812","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

Investigations on the equation of state of neutron star matter with density-dependent relativistic mean-field model 用密度相关相对论均场模型研究中子星物质的状态方程

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07038

Kaixuan Huang, Jinniu Hu

{"title":"Investigations on the equation of state of neutron star matter with density-dependent relativistic mean-field model","authors":"Kaixuan Huang, Jinniu Hu","doi":"arxiv-2409.07038","DOIUrl":"https://doi.org/arxiv-2409.07038","url":null,"abstract":"The compact object with a mass of $2.50-2.67~M_odot$ observed by LIGO\u0000Scientific and Virgo collaborations in GW190814, as well as the recent report\u0000of a light compact object with a mass and radius of\u0000$M=0.77^{+0.20}_{-0.17}M_{odot}$ and $R=10.4^{+0.86}_{-0.78}$ km within the\u0000supernova remnant HESS J1731-347, have posed a great challenge to the\u0000investigations into the supranuclear matter. In the inner core region of the\u0000neutron star, the strangeness degrees of freedom, such as the hyperons, can be\u0000present, which is also named as a hyperonic star. In this work, the neutron\u0000star consisting of nucleons and leptons, and the hyperonic star including the\u0000hyperons will be studied in the framework of the density-dependent relativistic\u0000mean-field (DDRMF) model. Some popular DDRMF parameterizations will be adopted\u0000to investigate the properties of nuclear matter and the mass, radius, tidal\u0000deformability, and other properties of neutron star and hyperonic stars. We\u0000find that the maximum masses of neutron star calculated by DD-MEX, DD-MEX1,\u0000DD-MEX2, DD-MEXY and DD-LZ1 sets can be around $2.5-2.6~M_odot$ with quite\u0000stiff equations of state (EOSs) generated by their strong repulsive\u0000contributions from vector potentials at high densities. Moreover, by\u0000investigating the influence of the crust EOS and core EOS on the neutron stars,\u0000we find that the observational data from HESS J1731-347 suggest the requirement\u0000of a crust EOS with a higher $L$ parameter and a core EOS with a lower $L$\u0000parameter, and the $M-R$ relations from the constructed EOSs can also be\u0000consistent with the observables of PSR J0740+6620, PSR J0030+0451 from NICER\u0000and the GW170817 event. With the inclusion of hyperons, the hyperonic star\u0000matter becomes softer compared to the neutron star matter. But the massive\u0000hyperonic star can also be obtained with DDRMF parameter sets if the vector\u0000coupling constants are strong.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206811","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

Phenomenological model for the $γ^*γto ηπ^+ π^-$ reaction in the $f_1(1285)$ energy region 能量区 $f_1(1285)$ 中 $γ^*γto ηπ^+ π^-$ 反应的现象学模型

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07235

Xiu-Lei Ren, Igor Danilkin, Marc Vanderhaeghen

引用次数: 0

Minimizing Selection Bias in Inclusive Jets in Heavy-Ion Collisions with Energy Correlators -- arXiv note 用能量相关器尽量减少重离子碰撞中包容性射流的选择偏差 -- arXiv note

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07526

Carlota Andres, Jack Holguin

引用次数: 0

Minimizing Selection Bias in Inclusive Jets in Heavy-Ion Collisions with Energy Correlators 用能量相关器最小化重离子碰撞中包容性射流的选择偏差

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07514

Carlota Andres, Jack Holguin, Raghav Kunnawalkam Elayavalli, Jussi Viinikainen

引用次数: 0

Computing the QRPA Level Density with the Finite Amplitude Method 用有限振幅法计算 QRPA 电平密度

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07644

Antonio Bjelčić, Nicolas Schunck

引用次数: 0

$^{61}$Cr as a Doorway to the N = 40 Island of Inversion $^{61}$Cr是通向N = 40反转岛的大门

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07324

L. Lalanne, M. Athanasakis-Kaklamanakis, D. D. Dao, Á. Koszorús, Y. C. Liu, R. Mancheva, F. Nowacki, J. Reilly, C. Bernerd, K. Chrysalidis, T. E. Cocolios, R. P. de Groote, K. T. Flanagan, R. F. Garcia Ruiz, D. Hanstorp, R. Heinke, M. Heines, P. Lassegues, K. Mack, B. A. Marsh, A. McGlone, K. M. Lynch, G. Neyens, B. van den Borne, R. Van Duyse, X. F. Yang, J. Wessolek

{"title":"$^{61}$Cr as a Doorway to the N = 40 Island of Inversion","authors":"L. Lalanne, M. Athanasakis-Kaklamanakis, D. D. Dao, Á. Koszorús, Y. C. Liu, R. Mancheva, F. Nowacki, J. Reilly, C. Bernerd, K. Chrysalidis, T. E. Cocolios, R. P. de Groote, K. T. Flanagan, R. F. Garcia Ruiz, D. Hanstorp, R. Heinke, M. Heines, P. Lassegues, K. Mack, B. A. Marsh, A. McGlone, K. M. Lynch, G. Neyens, B. van den Borne, R. Van Duyse, X. F. Yang, J. Wessolek","doi":"arxiv-2409.07324","DOIUrl":"https://doi.org/arxiv-2409.07324","url":null,"abstract":"This paper reports on the measurement of the ground-state spin and nuclear\u0000magnetic dipole moment of $^{61}$Cr. The radioactive ion beam was produced at\u0000the CERN-ISOLDE facility and was probed using high-resolution resonance\u0000ionization laser spectroscopy with the CRIS apparatus. The present ground-state\u0000spin measurement $I = frac{1}{2}$, differing from the previously adopted $I\u0000=(frac{5}{2})$, has significant consequences on the interpretation of existing\u0000beta decay data and nuclear structure in the region. The structure and shape of\u0000$^{61}$Cr is interpreted with state-of-the-art Large-Scale Shell Model and\u0000Discrete-Non-Orthogonal Shell Model calculations. From the measured magnetic\u0000dipole moment $mu(^{61}$Cr$)=+0.539(7)~mu_N$ and the theoretical findings,\u0000its configuration is understood to be driven by 2 particle - 2 hole neutron\u0000excitations with an unpaired $1p_{1/2}$ neutron. This establishes the western\u0000border of the $N=40$ Island Of Inversion (IoI), characterized by 4 particle - 4\u0000hole neutron components. We discuss the shape evolution along the Cr isotopic\u0000chain as a quantum phase transition at the entrance of the $N=40$ IoI.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226247","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

Ab initio Green's functions approach for homogeneous nuclear matter 同质核物质的 Ab initio 格林函数方法

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07432

Francesco Marino, Carlo Barbieri, Gianluca Colò, Weiguang Jiang, Samuel J. Novario

引用次数: 0

Resummed spin hydrodynamics from quantum kinetic theory 来自量子动力学理论的简述自旋流体力学

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-11 DOI: arxiv-2409.07143

David Wagner

引用次数: 0