论文标题
光矢量和轴向矢量介子的中等特性：狄拉克海的影响
In-medium properties of light vector and axial-vector mesons: effects of Dirac sea
论文作者
论文摘要
在磁化的核物质中研究了光线向量的中等质量，$ρ^{0，\ pm} $，$ω$，$ω$，$ a_1^{0，\ pm} $ mesons $ a_1^{0，\ pm} $ mesons在磁化的核物质中进行了研究，以核算Dirac Sea的影响。 $ A_1 \ rightArrowρπ$通道的中等内部衰减宽度是通过应用现象学Lagrangian来说明$A_1ρπ$相互作用顶点的现象学Lagrangian来研究的。在QCD和规则框架内计算的质量是根据轻夸克（$ \ sim \ langle \ bar {q} q \ rangle $）和标量gluon冷凝物（$ \ sim \ sim \ sim \ langle g^2 \ rangle $），以及光四Quark Concensate（$ quark Concensate（$ sim \ sim \ sim s） \ bar {q} q \ rangle^2 $）。冷凝水是根据中等修改标量字段在手性$ SU（3）$模型中计算的。除了手学有效模型中，磁场的效果通过核物质中核子的异常磁矩（AMM）的质子，核物质中核子的异常磁矩（AMM）纳入。带有磁场的光夸克冷凝水的增强（还原）称为（逆）磁催化。磁场对$ a_1 $介子的中等内形衰减宽度的影响，通过狄拉克海效应是显着的，这是核子的AMMS。这可能会影响非中央重离子碰撞实验中的光中膜产量，在该实验中，估计的磁场非常大。
The in-medium masses of the light vector, $ρ^{0, \pm}$, $ω$ and the light axial-vector, $A_1^{0, \pm}$ mesons, are studied in the magnetized nuclear matter, accounting for the effects of the Dirac sea. The in-medium partial decay widths for the $A_1\rightarrow ρπ$ channels, are studied from the in-medium masses of the initial and the final state particles, by applying a phenomenological Lagrangian to account for the $A_1ρπ$ interaction vertices. The masses calculated within the QCD sum rule framework, are obtained in terms of the light quark ($\sim \langle \bar{q}q \rangle$) and the scalar gluon condensates ($\sim \langle G^2 \rangle$), as well as the light four-quark condensate ($\sim \langle \bar{q}q\rangle^2 $). The condensates are calculated within the chiral $SU(3)$ model in terms of the medium modified scalar fields. The effects of magnetic fields are incorporated through the Landau energy levels of protons, anomalous magnetic moments (AMMs) of the nucleons in the nuclear matter, in addition to the magnetized Dirac sea contribution, within the chiral effective model. The enhancement (reduction) of the light quark condensates with magnetic field, is called (inverse) magnetic catalysis. The effects of magnetic fields on the in-medium hadronic decay widths of the $A_1$ mesons, are observed to be significant through the Dirac sea effect, accounting for the AMMs of the nucleons. This may affect the light mesons production in the non-central, heavy-ion collision experiments, where estimated magnetic field is very large.
