论文标题
磁化核物质中的开放式魅力介子 - （反）磁催化的影响
Open Charm mesons in magnetized nuclear matter -- effects of (inverse) magnetic catalysis
论文作者
论文摘要
在手性有效模型中研究了磁化异种不对称核物质的开放式魅力（$ d $和$ \ bar d $）的中等质量，包括对核子的自我增强作用的贡献。在模型中，这些介子的质量是根据它们与核子和标量的相互作用计算得出的（$σ\ sim（\ langle \ bar u u \ rangle+\ langle+\ langle \ langle \ bar d d d \ rangle）$，$ quble \ sim \ sim \ sim \ langle { u \ rangle- \ langle {\ bar d} d \ rangle）$）字段。观察到狄拉克海的贡献导致夸克冷凝物的增强（还原）随磁场的增加而增强，这种效果称为“（反）磁性催化”。观察到这些贡献可以显着修改手动有效模型中计算出的开放式魅力梅森质量。在存在外部磁场的情况下，伪尺度和载体介子（PV混合）的混合，导致伪喀尔群（载体的纵向成分）介子的质量中的滴（增加）。除了观察到PV混合和Landau水平的贡献（用于带电的介子）外，（反）磁催化的作用可导致对开放式魅力介子质量的显着修改。 These can modify the decay widths of the charmonium states to open charm mesons, e.g., $ψ(3770)\rightarrow D\bar D$, as well as $D^*\rightarrow Dπ$ (and $\bar {D^*}\rightarrow {\bar D}π$), which can affect the production of the open charm and charmonium states in ultra relativistic周围重离子碰撞实验，其中创建的磁场很大。
The in-medium masses of the open charm ($D$ and $\bar D$) mesons in magnetized isospin asymmetric nuclear matter are investigated within a chiral effective model, including the contributions of the Dirac sea (DS) to the self-energies of the nucleons. Within the model, the masses of these mesons are calculated from their interactions with the nucleons and the scalar ($σ\sim(\langle\bar u u\rangle+\langle \bar d d \rangle)$, $ζ\sim\langle {\bar s}s\rangle$ and $δ\sim(\langle{\bar u} u\rangle-\langle {\bar d} d\rangle)$) fields. The Dirac sea contributions are observed to lead to an enhancement (reduction) of the quark condensates with increase in magnetic field, an effect called `(inverse) magnetic catalysis'. These contributions are observed to appreciably modify the open charm meson masses calculated within the chiral effective model. In the presence of an external magnetic field, there is mixing of the pseudoscalar and the vector mesons (PV mixing), leading to as a drop (increase) in the mass of the pseudoscalar (longitudinal component of the vector) meson. The effects of the (inverse) magnetic catalysis, in addition to the PV mixing and Landau level contribtuions (for charged mesons) are observed to lead to significant modifications to the masses of the open charm mesons. These can modify the decay widths of the charmonium states to open charm mesons, e.g., $ψ(3770)\rightarrow D\bar D$, as well as $D^*\rightarrow Dπ$ (and $\bar {D^*}\rightarrow {\bar D}π$), which can affect the production of the open charm and charmonium states in ultra relativistic peripheral heavy ion collision experiments, where the created magnetic field is huge.
