发表机构
National University of Ireland Maynooth; University of Southern Denmark; Sejong University(梅努斯大学; 南丹麦大学; 世宗大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
利用FASTSUM合作组的各向异性格点系综和NRQCD方法,研究热QCD中B和B_s介子谱,发现T_c以上B介子受热效应更显著且束缚态解离。
AI 中文摘要
对热QCD物质中重轻介子行为进行第一性原理研究,对于解释相对论重离子碰撞实验中开放重味产生的实验结果至关重要。利用FASTSUM合作组提供的各向异性格点系综,其中包含Nf=2+1动态Wilson-clover费米子且处于非零温度,我们研究了非零温度下的B和B_s谱。我们使用相对论性轻夸克传播子,而b夸克传播子则通过非相对论有效理论(NRQCD)计算。我们发现,在T_c以上,热效应对B介子态的影响比对B_s态的影响更为显著。此外,我们的结果支持B介子束缚态在T_c以上发生解离。
英文摘要
A first-principles investigation of heavy-light meson behaviour in hot QCD matter is essential for the interpretation of experimental results associated with open heavy flavour productions in relativistic heavy-ion collision experiments. Using anisotropic lattice ensembles from the FASTSUM collaboration with Nf=2+1 dynamical Wilson-clover fermions at non-zero temperatures, we study the B and B_s spectra at non-zero temperature. We use relativistic light quark propagators, while the b quark propagators are computed with a non-relativistic effective theory (NRQCD). We find that above T_c, thermal effects on the B meson states are more significant than those on the B_s states. Also, our results support the dissolution of the B-meson bound states above T_c.
Comments7 pages, 5 figures