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arXiv 1111.2222hep-lat
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静态轻介子对间的势

Potentials between pairs of static-light mesons

Gunnar Bali, Martin Hetzenegger

摘要:

本文对Nf = 2格点量子色动力学中静态轻介子对在不同自旋和同位旋通道中的相互作用势的研究进行了综述。吸引力和排斥力的问题对于X(3872)粲偶素态和带电的候选者如Z+(4430)特别有趣。我们采用非微扰改进的Sheikholeslami-Wohlert费米子和威尔逊规范作用量,在两个晶格间距a左右。0.084 fm和大约0.077 fm,赝标量质量约为mPS。770 MeV和mPS近似。400 MeV。我们使用随机的所有到所有的传播技术,改进了跳跃参数扩展。分析是基于变分法,利用各种源和汇插值。

英文摘要:

We give an update on our ongoing investigations of potentials between pairs of static-light mesons in Nf=2 Lattice QCD, in different spin and isospin channels. The question of attraction and repulsion is particularly interesting with respect to the X(3872) charmonium state and charged candidates such as the Z+(4430). We employ the nonperturbatively improved Sheikholeslami-Wohlert fermion and the Wilson gauge actions at two lattice spacings a approx. 0.084 fm and a approx. 0.077 fm with a pseudoscalar mass of mPS approx. 770 MeV and mPS approx. 400 MeV respectively. We use stochastic all-to-all propagator techniques, improved by a hopping parameter expansion. The analysis is based on the variational method, utilizing various source and sink interpolators.

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。

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