Journal of Physics G最新文献_第9页

Quark matter at finite temperature under strong magnetic fields within Nambu–Jona-Lasinio model Nambu-Jona-Lasinio模型中有限温度强磁场下的夸克物质

Journal of Physics G Pub Date : 2020-07-08 DOI: 10.1088/1361-6471/ab9b06

P. Chu, Yi Zhou, Chang Chen, Xiao-Hua Li, Hongyang Ma

引用次数: 10

Properties of nuclear matter in relativistic Brueckner–Hartree–Fock model with high-precision charge-dependent potentials 具有高精度电荷依赖势的相对论Brueckner-Hartree-Fock模型中核物质的性质

Journal of Physics G Pub Date : 2020-07-03 DOI: 10.1088/1361-6471/aba423

Chencan Wang, Jinniu Hu, Ying Zhang, Hong Shen

{"title":"Properties of nuclear matter in relativistic Brueckner–Hartree–Fock model with high-precision charge-dependent potentials","authors":"Chencan Wang, Jinniu Hu, Ying Zhang, Hong Shen","doi":"10.1088/1361-6471/aba423","DOIUrl":"https://doi.org/10.1088/1361-6471/aba423","url":null,"abstract":"Properties of nuclear matter are investigated in the framework of relativistic Brueckner-Hartree-Fock model with the latest high-precision charge-dependent Bonn (pvCD-Bonn) potentials, where the coupling between pion and nucleon is adopted as pseudovector form. These realistic pvCD-Bonn potentials are renormalized to effective nucleon-nucleon ($NN$) interactions, $G$ matrices. They are obtained by solving the Blankenbecler-Sugar (BbS) equation in nuclear medium. Then, the saturation properties of symmetric nuclear matter are calculated with pvCD-Bonn A, B, C potentials. The energies per nucleon are around $-10.72$ MeV to $-16.83$ MeV at saturation densities, $0.139$ fm$^{-3}$ to $0.192$ fm$^{-3}$ with these three potentials, respectively. It clearly demonstrates that the pseudovector coupling between pion and nucleon can generate reasonable saturation properties comparing with pseudoscalar coupling. Furthermore, these saturation properties have strong correlations with the tensor components of $NN$ potentials, i.e., the $D$-state probabilities of deuteron, $P_D$ to form a relativistic Coester band. In addition, the charge symmetry breaking (CSB) and charge independence breaking (CIB) effects are also discussed in nuclear matter from the partial wave contributions with these high-precision charge-dependent potentials. In general, the magnitudes of CSB from the differences between $nn$ and $pp$ potentials are about $0.05$ MeV, while those of CIB are around $0.35$ MeV from the differences between $np$ and $pp$ potentials. Finally, the equations of state of asymmetric nuclear matter are also calculated with different asymmetry parameters. It is found that the effective neutron mass is larger than the proton one in neutron-rich matter.","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90326871","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: 6

Phenomenological description of non-axial shapes of some doubly even neutron deficient barium isotopes 双偶缺中子钡同位素非轴向形状的现象学描述

Journal of Physics G Pub Date : 2020-07-01 DOI: 10.1088/1361-6471/ab81dd

Ridham Bakshi, Surbhi Gupta, Suram Singh, A. Bharti, G. H. Bhat, J. Sheikh

引用次数: 6

Hindrance factors of unfavored α decay transitions to duplicated daughter states of the same spin and parity 不利α衰变转变为相同自旋和宇称的重复子态的阻碍因子

Journal of Physics G Pub Date : 2020-06-23 DOI: 10.1088/1361-6471/ab8453

W. Seif, A. Hashem

{"title":"Hindrance factors of unfavored α decay transitions to duplicated daughter states of the same spin and parity","authors":"W. Seif, A. Hashem","doi":"10.1088/1361-6471/ab8453","DOIUrl":"https://doi.org/10.1088/1361-6471/ab8453","url":null,"abstract":"We investigate the hindrance of the unfavored α-decay modes to the different daughter states, which have different spin than that of the parent nucleus but of the same parity. The duplicated daughter nucleus states of identical spin-parity (J π ) are ascendingly ordered according to the sequence of their excitation energy. We found that the hindrance of the unfavored decay modes increases with increasing the difference in spin (ΔJ) between the parent and daughter states. This hindrance slightly increases when the daughter state has less spin than the parent. The preformation probability (S α ) decreases with ΔJ and the decay slows down. Furthermore, the increase of the order (n) of the state to which the decay takes place brings the decay intensity drop significantly and decrease. Consequently, the partial half-life strongly increases with n. The hindrance factor averagely drops from few tenths, for an unfavored decay mode to first appearing state of a certain J π , to about 10−9 for the decay mode to the identical excited state that appear for the sixth time. The associated half-lives accordingly increase with the reciprocal ratios. The value of the corresponding preformation probability drops about 3 orders of magnitude. Simple formulas are given to describe the hindrance of both the unfavored decay intensity and S α as functions of ΔJ and n.","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"9 1","pages":"085103"},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86201775","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

Probing the sensitivity to leptonic δ CP in presence of invisible decay of ν 3 using atmospheric neutrinos 利用大气中微子探测ν 3不可见衰变时轻子δ CP的灵敏度

Journal of Physics G Pub Date : 2020-06-07 DOI: 10.1088/1361-6471/abacd9

Lakshmi S Mohan

引用次数: 5

Effects of popcorn mechanisms in p + p and Pb + Pb collisions at CERN SPS energies within the HIJING code HIJING码内CERN SPS能量下p + p和Pb + Pb碰撞爆花机制的影响

Journal of Physics G Pub Date : 2020-06-01 DOI: 10.1088/1361-6471/ab8452

Khaled Abdel-Waged, Nuha Felemban

引用次数: 4

Indication of γ -vibration in 123,125,127I 123,125,127I的γ振动指示

Journal of Physics G Pub Date : 2020-05-29 DOI: 10.1088/1361-6471/ab97c8

S. Chakraborty, H. Sharma, S. Tiwary, C. Majumder, P. Banerjee, S. Ganguly, S. Kumar, A. Kumar, R. Singh, S. Muralithar