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arXiv 1803.03065hep-lat
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双味格点量子色动力学中的轻子D_s衰变

Leptonic D_s decays in two-flavour lattice QCD

Benoit Blossier, Jochen Heitger, Matthias Post

摘要:

用双味格点量子色动力学研究了由衰变常数f_{D_s}和f_{D_s^*}参数化的D_s和D_s^* 轻子衰变.随着LHCb和Belle II实验的开展,D_s区的唯象学研究在未来几年内将是非常有希望的,因此,在晶格计算中考虑它的非微扰QCD贡献是值得的。在研究更具有挑战性的过程,如强子-强子跃迁,自然的第一步是解决一些基本方面的轻子衰变的背景下,在那里的系统不确定性的激发态污染和截断效应的计算粲介子衰变矩阵元可以在一个更直接的设置进行调查。

英文摘要:

We report on a two-flavour lattice QCD study of the D_s and D_s^* leptonic decays parameterized by the decay constants f_{D_s} and f_{D_s^*}. As the phenomenology in the D_s sector seems very promising in the next years with the experiments LHCb and Belle II, it is worth putting a big effort in lattice computations regarding its non-perturbative QCD contributions. Before examining more challenging processes such as hadron-hadron transitions, a natural first step is to address some basic aspects in the context of leptonic decays, where systematic uncertainties from excited state contaminations and cut-off effects in the computation of charmed meson decay matrix elements can be investigated in a more straightforward setting.

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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