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Neutral and charged scalar mesons, pseudoscalar mesons, and diquarks in magnetic fields

文献类型:期刊论文

作者Liu, Hao1,2,3; Wang, Xinyang1; Yu, Lang4,5; Huang, Mei1,2,6
刊名Physical review d
出版日期2018-04-17
卷号97期号:7页码:12
ISSN号2470-0010
DOI10.1103/physrevd.97.076008
通讯作者Liu, hao()
英文摘要We investigate both (pseudo) scalar mesons and diquarks in the presence of external magnetic field in the framework of the two-flavored nambu-jona-lasinio (njl) model, where mesons and diquarks are constructed by infinite sum of quark-loop chains by using random phase approximation. the polarization function of the quark-loop is calculated to the leading order of 1/n-c expansion by taking the quark propagator in the landau level representation. we systematically investigate the masses behaviors of scalar sigma meson, neutral and charged pions as well as the scalar diquarks, with respect to the magnetic field strength at finite temperature and chemical potential. it is shown that the numerical results of both neutral and charged pions are consistent with the lattice qcd simulations. the mass of the charge neutral pion keeps almost a constant under the magnetic field, which is preserved by the remnant symmetry of qcd x qed in the vacuum. the mass of the charge neutral scalar sigma is around two times quark mass and increases with the magnetic field due to the magnetic catalysis effect, which is an typical example showing that the polarized internal quark structure cannot be neglected when we consider the meson properties under magnetic field. for the charged particles, the one quark-antiquark loop contribution to the charged pi(+/-) increases essentially with the increase of magnetic fields due to the magnetic catalysis of the polarized quarks. however, the one quark-quark loop contribution to the scalar diquark mass is negative comparing with the point-particle result and the loop effect is small.
WOS关键词JONA-LASINIO MODEL ; HEAVY-ION COLLISIONS ; QUANTUM CHROMODYNAMICS ; ELECTROMAGNETIC-FIELD ; FINITE-TEMPERATURE ; PHASE-TRANSITIONS ; DYNAMICAL MODEL ; SUPERCONDUCTIVITY ; SYMMETRY ; LATTICE
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000430163500009
URI标识http://www.irgrid.ac.cn/handle/1471x/2178110
专题高能物理研究所
通讯作者Liu, Hao
作者单位1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100039, Peoples R China
3.Jinyuan Senior High Sch, Shanghai 200333, Peoples R China
4.Jilin Univ, Ctr Theoret Phys, Changchun 130012, Jilin, Peoples R China
5.Jilin Univ, Coll Phys, Changchun 130012, Jilin, Peoples R China
6.Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
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GB/T 7714
Liu, Hao,Wang, Xinyang,Yu, Lang,et al. Neutral and charged scalar mesons, pseudoscalar mesons, and diquarks in magnetic fields[J]. Physical review d,2018,97(7):12.
APA Liu, Hao,Wang, Xinyang,Yu, Lang,&Huang, Mei.(2018).Neutral and charged scalar mesons, pseudoscalar mesons, and diquarks in magnetic fields.Physical review d,97(7),12.
MLA Liu, Hao,et al."Neutral and charged scalar mesons, pseudoscalar mesons, and diquarks in magnetic fields".Physical review d 97.7(2018):12.

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