arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.2701hep-lat
收藏

三味格点量子色动力学中的夸克偶素质量分裂

Quarkonium mass splittings in three-flavor lattice QCD

T. Burch, C. DeTar, M. Di Pierro, A. X. El-Khadra, E. D. Freeland, Steven Gottlieb, A. S. Kronfeld, L. Levkova, P. B. Mackenzie, J. N. Simone

摘要:

本文报道了格点量子色动力学中粲偶素和底偶素光谱的计算。我们用三种海夸克的规范场系综,用交错费米子的asqtad改进作用量模拟。对于重夸克,我们采用威尔逊费米子的三叶草作用量的费米实验室解释。这些计算提供了对格点量子色动力学,包括重夸克离散化误差理论的检验。因此,我们提供了一个仔细的讨论结果,根据重夸克有效拉格朗日。在考虑参数误差和离散误差的情况下,计算结果与实验结果基本一致。

英文摘要:

We report on calculations of the charmonium and bottomonium spectrum in lattice QCD. We use ensembles of gauge fields with three flavors of sea quarks, simulated with the asqtad improved action for staggered fermions. For the heavy quarks we employ the Fermilab interpretation of the clover action for Wilson fermions. These calculations provide a test of lattice QCD, including the theory of discretization errors for heavy quarks. We provide, therefore, a careful discussion of the results in light of the heavy-quark effective Lagrangian. By and large, we find that the computed results are in agreement with experiment, once parametric and discretization errors are taken into account.

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。

↑