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Global polarization in heavy-ion collisions based on the axial vortical effect 基于轴向涡效应的重离子碰撞全局极化
arXiv: Nuclear Theory Pub Date : 2020-06-25 DOI: 10.1103/physrevc.102.044904
Y. Ivanov
{"title":"Global polarization in heavy-ion collisions based on the axial vortical effect","authors":"Y. Ivanov","doi":"10.1103/physrevc.102.044904","DOIUrl":"https://doi.org/10.1103/physrevc.102.044904","url":null,"abstract":"Global polarization of $Lambda$ and $bar{Lambda}$ is calculated based on the axial vortical effect (AVE). Simulations are performed within the model of the three-fluid dynamics. Equations of state with the deconfinement transition result in a good agreement with STAR data for both $Lambda$ and $bar{Lambda}$ polarization, in particular, with the $Lambda$-$bar{Lambda}$ splitting. Suppression of the gravitational-anomaly contribution required for the data reproduction is in agreement with predictions of the QCD lattice simulations. Predictions for the global polarization in forthcoming experiments at lower collision energies are made. These forthcoming data will provide a critical test for the AVE and thermodynamic mechanisms of the polarization.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73136470","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: 7
Probing the fission properties of neutron-rich actinides with the astrophysical r process 用天体物理过程探测富中子锕系元素的裂变特性
arXiv: Nuclear Theory Pub Date : 2020-06-19 DOI: 10.1051/epjconf/202024204002
N. Vassh, M. Mumpower, T. Sprouse, R. Surman, R. Vogt
{"title":"Probing the fission properties of neutron-rich actinides with the astrophysical r process","authors":"N. Vassh, M. Mumpower, T. Sprouse, R. Surman, R. Vogt","doi":"10.1051/epjconf/202024204002","DOIUrl":"https://doi.org/10.1051/epjconf/202024204002","url":null,"abstract":"We review recent work examining the influence of fission in rapid neutron capture ($r$-process) nucleosynthesis which can take place in astrophysical environments. We briefly discuss the impact of uncertain fission barriers and fission rates on the population of heavy actinide species. We demonstrate the influence of the fission fragment distributions for neutron-rich nuclei and discuss currently available treatments, including recent macroscopic-microscopic calculations. We conclude by comparing our nucleosynthesis results directly with stellar data for metal-poor stars rich in $r$-process elements to consider whether fission plays a role in the so-called `universality' of $r$-process abundances observed from star to star.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76448981","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: 2
Entanglement and correlation in two-nucleon systems 双核子系统中的纠缠和相关
arXiv: Nuclear Theory Pub Date : 2020-06-12 DOI: 10.1088/1361-6471/abc2dd
A. Kruppa, J. Kov'acs, P. Salamon, Ö. Legeza
{"title":"Entanglement and correlation in two-nucleon systems","authors":"A. Kruppa, J. Kov'acs, P. Salamon, Ö. Legeza","doi":"10.1088/1361-6471/abc2dd","DOIUrl":"https://doi.org/10.1088/1361-6471/abc2dd","url":null,"abstract":"We examine the mode entanglement and correlation of two fermionic particles. We study the one- and two-mode entropy and a global characteristic, the one-body entanglement entropy. We consider not only angular momentum coupled states with single configuration but use the configuration interaction method. With the help of the Slater decomposition, we derive analytical expressions for the entanglement measures. We show that when the total angular momentum is zero specific single configurations describe maximally entangled states. It turns out that for a finite number of associated modes the one- and two-mode entropies have identical values. In the shell model framework, we numerically study two valence neutrons in the $sd$ shell. The one-body entanglement entropy of the ground state is close to the maximal value and the associated modes have the largest mutual information.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79261085","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: 15
Factorial cumulants from global baryon number conservation 全局重子数守恒的阶乘累积量
arXiv: Nuclear Theory Pub Date : 2020-06-04 DOI: 10.1103/physrevc.102.064908
Michael F. Barej, A. Bzdak
{"title":"Factorial cumulants from global baryon number conservation","authors":"Michael F. Barej, A. Bzdak","doi":"10.1103/physrevc.102.064908","DOIUrl":"https://doi.org/10.1103/physrevc.102.064908","url":null,"abstract":"The proton, antiproton and mixed proton-antiproton factorial cumulants originating from the global conservation of baryon number are calculated analytically up to the sixth order. Our results can be directly tested in experiments.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"33 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77480752","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: 3
Strange mesons in strong magnetic fields 强磁场中的奇异介子
arXiv: Nuclear Theory Pub Date : 2020-06-04 DOI: 10.1142/S0218301321500142
A. Mishra, S. Misra
{"title":"Strange mesons in strong magnetic fields","authors":"A. Mishra, S. Misra","doi":"10.1142/S0218301321500142","DOIUrl":"https://doi.org/10.1142/S0218301321500142","url":null,"abstract":"The masses of the strange mesons ($K$, $K^*$ and $phi$) are investigated in the presence of strong magnetic fields. The changes in the masses of these mesons arise from the mixing of the pseusdoscalar and vector mesons in the presence of a magnetic field. For the charged mesons, these mass modifications are in addition to the contributions from the lowest Landau energy levels to their masses. The decay widths, $phi rightarrow Kbar K$ and $K^* rightarrow Kpi$, in the presence of the magnetic field are studied using a field theoretic model of composite hadrons with constituent quarks/antiquarks. The model uses the free Dirac Hamiltonian in terms of the constituent quark fields as the light quark antiquark pair creation term and explicit constructions for the meson states in terms of the constituent quarks and anitiquarks to study the decay processes. The study of the masses and decay widths of the strange mesons in strong magnetic fields can have observable consequences on the production of the open and hidden strange mesons in the peripheral ultra high energy collisions at LHC, where the created magnetic field can be huge.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"91 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79934655","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: 2
Accurate nuclear symmetry energy at finite temperature within a Brueckner-Hartree-Fock approach 布鲁克纳-哈特里-福克方法在有限温度下精确的核对称能
arXiv: Nuclear Theory Pub Date : 2020-05-29 DOI: 10.1103/PHYSREVC.103.024307
Fan Li, Jia-Jing Lu, Zeng-Hua Li, Chongyang Chen, G. Burgio, H. Schulze
{"title":"Accurate nuclear symmetry energy at finite temperature within a Brueckner-Hartree-Fock approach","authors":"Fan Li, Jia-Jing Lu, Zeng-Hua Li, Chongyang Chen, G. Burgio, H. Schulze","doi":"10.1103/PHYSREVC.103.024307","DOIUrl":"https://doi.org/10.1103/PHYSREVC.103.024307","url":null,"abstract":"We compute the free energy of asymmetric nuclear matter in a Brueckner-Hartree-Fock approach at finite temperature, paying particular attention to the dependence on isospin asymmetry. The first- and second-order symmetry energies are determined as functions of density and temperature and useful parametrizations are provided. We find small deviations from the quadratic isospin dependence and very small corresponding effects on (proto)neutron star structure.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75200160","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: 3
Light mesons within the basis light-front quantization framework 基光前量子化框架内的光介子
arXiv: Nuclear Theory Pub Date : 2020-05-28 DOI: 10.1103/physrevc.102.055207
W. Qian, Shaoyang Jia, Yang Li, J. Vary
{"title":"Light mesons within the basis light-front quantization framework","authors":"W. Qian, Shaoyang Jia, Yang Li, J. Vary","doi":"10.1103/physrevc.102.055207","DOIUrl":"https://doi.org/10.1103/physrevc.102.055207","url":null,"abstract":"We study the light-unflavored mesons as relativistic bound states in the nonperturbative Hamiltonian formalism of the basis light-front quantization (BLFQ) approach. The dynamics for the valence quarks of these mesons is specified by an effective Hamiltonian containing the one-gluon exchange interaction and the confining potentials both introduced in our previous work on heavy quarkonia, supplemented additionally by a pseudoscalar contact interaction. We diagonalize this Hamiltonian in our basis function representation to obtain the mass spectrum and the light-front wave functions (LFWFs). Based on these LFWFs, we then study the structure of these mesons by computing the electromagnetic form factors, the decay constants, the parton distribution amplitudes (PDAs), and the parton distribution functions (PDFs). Our results are comparable to those from experiments and other theoretical models.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88563959","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: 18
Isoscalar monopole and quadrupole modes in Mo isotopes: Microscopic analysis Mo同位素的等标量单极子和四极子模式:显微分析
arXiv: Nuclear Theory Pub Date : 2020-05-20 DOI: 10.1016/j.physletb.2020.135940
G. Colò, D. Gambacurta, W. Kleinig, J. Kvasil, V. Nesterenko, A. Pastore
{"title":"Isoscalar monopole and quadrupole modes in Mo isotopes: Microscopic analysis","authors":"G. Colò, D. Gambacurta, W. Kleinig, J. Kvasil, V. Nesterenko, A. Pastore","doi":"10.1016/j.physletb.2020.135940","DOIUrl":"https://doi.org/10.1016/j.physletb.2020.135940","url":null,"abstract":"","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85190832","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: 8
Cross-shell excitations in doubly magic 132Sn and its nearest neighbours 双神奇132Sn及其近邻的交叉壳层激发
arXiv: Nuclear Theory Pub Date : 2020-05-19 DOI: 10.1016/j.nuclphysa.2021.122262
Sangeeta Das, M. Sarkar
{"title":"Cross-shell excitations in doubly magic 132Sn and its nearest neighbours","authors":"Sangeeta Das, M. Sarkar","doi":"10.1016/j.nuclphysa.2021.122262","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2021.122262","url":null,"abstract":"","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86041835","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: 1
Level-density parameters in superheavy nuclei 超重核的能级密度参数
arXiv: Nuclear Theory Pub Date : 2020-05-18 DOI: 10.1103/PHYSREVC.103.034309
A. Rahmatinejad, A. Bezbakh, T. Shneidman, G. Adamian, N. Antonenko, P. Jachimowicz, M. Kowal
{"title":"Level-density parameters in superheavy nuclei","authors":"A. Rahmatinejad, A. Bezbakh, T. Shneidman, G. Adamian, N. Antonenko, P. Jachimowicz, M. Kowal","doi":"10.1103/PHYSREVC.103.034309","DOIUrl":"https://doi.org/10.1103/PHYSREVC.103.034309","url":null,"abstract":"We systematically study the nuclear level densities of superheavy nuclei, including odd systems, using the single-particle energies obtained with the Woods-Saxon potential diagonalization. Minimization over many deformation parameters for the global minima - ground states and the \"imaginary water flow\" technique on many deformation energy grids for the saddle points, including nonaxial shapes has been applied. The level density parameters are calculated by fitting the obtained results with the standard Fermi gas expression. The total potential energy and shell correction dependencies of the level-density parameter are analyzed and compared at the ground state and saddle point. These parameters are compared with the results of the phenomenological expression. As shown, this expression should be modified for the saddle points, especially for small excitation energy. The ratio of the level-density parameter at the saddle point to that at the ground state is shown to be crucial for the survival probability of the heavy nucleus.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81757139","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: 1
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