$B \to D^{(*)}\ well \nu$从具有相对论性重夸克的晶格QCD中形成因子

Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-26 DOI:10.22323/1.363.0139

T. Kaneko, Y. Aokic, G. Bailas, B. Colquhoun, H. Fukaya, S. Hashimoto, J. Koponen

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引用次数: 5

摘要

我们报告了我们在2+1风味晶格QCD中对B \to D^(*) \ell\nu形状因子的计算。对于轻夸克、奇夸克、粲夸克和底夸克，使用Möbius域壁作用。在晶格截止点1/a \sim 2.4、3.6和4.5 GeV下，我们模拟了高达0.7/a的底夸克质量，以控制离散误差。介子的质量低至230兆电子伏。我们将形式因素外推到连续统极限和物理夸克质量，并与最近的现象学分析进行了比较。

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$B \to D^{(*)}\ell\nu$ form factors from lattice QCD with relativistic heavy quarks

We report on our calculation of the B \to D^(*) \ell \nu form factors in 2+1 flavor lattice QCD. The M\"obius domain-wall action is employed for light, strange, charm and bottom quarks. At lattice cutoffs 1/a \sim 2.4, 3.6 and 4.5 GeV, we simulate bottom quark masses up to 0.7/a to control discretization errors. The pion mass is as low as 230 MeV. We extrapolate the form factors to the continuum limit and physical quark masses, and make a comparison with recent phenomenological analyses.

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Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)

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