arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1312.4375hep-lat
收藏

高改进交错夸克在有限温度下的介子屏蔽质量

Meson screening masses at finite temperature with Highly Improved Staggered Quarks

Y. Maezawa, A. Bazavov, F. Karsch, P. Petreczky, S. Mukherjee

摘要:

首次研究了含奇异夸克($s$)和粲夸克($c$)的介子激发的屏蔽性质,特别是$\bar{s}s$、$\bar{s}c$和$\bar{c}c$味组合的赝标和矢量介子激发的基态屏蔽性质.通过比较它们各自的真空介子质量和研究变化的价夸克时间边界条件的影响,我们研究了这些介子激发的热修正。虽然$\bar{s}s$状态甚至在低于手性交叉温度$T_c$时也显示出显著的修改,但开粲和粲鎓样状态的修改仅分别在温度$T\gtrsim T_c$和$T\gtrsim1.2T_c$时才变得可见。

英文摘要:

We report on the first study of the screening properties of the mesonic excitations with strange ($s$) and charm ($c$) quarks, specifically the ground states of the pseudo-scalar and vector meson excitations for the $\bar{s}s$, $\bar{s}c$ and $\bar{c}c$ flavor combinations, using the Highly Improved Staggered Quark action with dynamical physical strange quark and nearly-physical up and down quarks. By comparing with their respective vacuum meson masses and by investigating the influence of the changing temporal boundary conditions of the valence quarks we study the thermal modifications of these mesonic excitations. While the $\bar{s}s$ states show significant modifications even below the chiral crossover temperature $T_c$, the modifications of the open-charm and charmonium like states become visible only for temperatures $T\gtrsim T_c$ and $T\gtrsim1.2T_c$, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑