Open Bottom mesons in magnetized matter: effects of (inverse) magnetic catalysis

IF 1 4区 物理与天体物理 Q4 PHYSICS, NUCLEAR
Sourodeep De, Pallabi Parui, A. Mishra
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引用次数: 0

Abstract

In-medium masses of the pseudoscalar and vector open bottom mesons ($B$, $\bar{B}$, $B_s$ and $B^*$, $\bar{B}^*$, $B_s^*$) are studied in the magnetized nuclear matter by considering the effects of Dirac sea, within the chiral effective model. The mass modifications arise due to the interactions of the open bottom mesons with the nucleons and the scalar mesons, calculated in terms of the scalar and number densities of the nucleons and the scalar fields fluctuations. The effects of the magnetized Dirac sea lead to the considerable changes in the scalar fields with magnetic field, which are related to the light quark condensates. There is observed to be a (reduction) enhancement in the light quark condensates with magnetic field, a phenomenon called (inverse) magnetic catalysis.The contribution of the magnetic field on the Fermi sea of nucleons are taken into account through the Landau energy levels of protons and anomalous magnetic moments (AMMs) of the nucleons. The additional contribution of the lowest Landau level for the charged mesons are considered. The spin-magnetic field interaction between the longitudinal component of the vector and the pseudoscalar mesons ($B^{*||}(\bar{B}^{*||})-B (\bar{B}))$ and ($B_s^{*||}-B_s$) are studied, which lead to a level repulsion between their masses with magnetic field. Magnetic fields are observed to have significant contribution on the in-medium masses of the open bottom mesons through the Dirac sea effect as comparedto the case when this effect is not considered. In vacuum, considerable changes are obtained only due to the magnetized Dirac sea at zero and finite nucleonic AMMs.
磁化物质中的开底介子:(反)磁催化效应
在考虑狄拉克海效应的手性有效模型中,研究了磁化核物质中赝标量和矢量开底介子($B$, $\bar{B}$, $B_s$和$B^*$, $\bar{B}^*$, $B_s^*$)的中质量。质量的变化是由开底介子与核子和标量介子的相互作用引起的,这是根据核子的标量密度和数量密度以及标量场波动来计算的。磁化狄拉克海的作用导致标量场随磁场的显著变化,这与轻夸克凝聚体有关。在磁场作用下,轻夸克凝聚体的还原增强,这种现象称为逆磁催化。通过质子的朗道能级和核子的反常磁矩(AMMs)来考虑磁场对费米核子海的贡献。考虑了带电介子的最低朗道能级的附加贡献。研究了矢量纵向分量与伪标量介子($B^{*||}(\bar{B}^{*||})-B (\bar{B}))$和($B_s^{*||}-B_s$)之间的自旋磁场相互作用,导致它们的质量与磁场之间存在水平斥力。与不考虑狄拉克海效应的情况相比,通过狄拉克海效应观察到磁场对开底介子的中质量有显著的贡献。在真空条件下,只有在零核和有限核原子磁场下磁化狄拉克海才会发生相当大的变化。
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来源期刊
International Journal of Modern Physics E
International Journal of Modern Physics E 物理-物理:核物理
CiteScore
1.90
自引率
18.20%
发文量
98
审稿时长
4-8 weeks
期刊介绍: This journal covers the topics on experimental and theoretical nuclear physics, and its applications and interface with astrophysics and particle physics. The journal publishes research articles as well as review articles on topics of current interest.
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