论文标题
$ b \toπ\ellν$的形式和$ | v_ {ub} | $的确定与möbiusdomain-wall-fermions
Form factors of $B\toπ\ellν$ and a determination of $|V_{ub}|$ with Möbius domain-wall-fermions
论文作者
论文摘要
我们使用完全相对论的晶格费米昂动作，计算半衰减衰减$ b \toπ\ellν$的形式，这是确定Cabibbo-Kobayashi-Maskawa矩阵矩阵元素$ | v_v_ {ub {ub} | $所必需的。我们利用Möbius域壁式形式主义来产生具有2+1个海夸克风味的晶格合奏以及价值重和轻质夸克。我们在晶格间距的各种值以及多个光和重夸克质量的各种值下计算形式因素，并将结果推断到物理点。我们将晶格结果与可用的实验数据相结合以获得$ | v_ {ub} | =（3.93 \ pm 0.41）\ times 10^{ - 3} $。
Using a fully relativistic lattice fermion action, we compute the form factors of the semileptonic decay $B\toπ\ellν$, which is required for the determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$. We employ the Möbius domain-wall fermion formalism for the generation of lattice ensembles with 2+1 sea quark flavours as well as for the valence heavy and light quarks. We compute the form factors at various values of the lattice spacing and multiple light and heavy quark masses, and extrapolate the results to the physical point. We combine our lattice results with the available experimental data to obtain $|V_{ub}| = (3.93\pm 0.41)\times 10^{-3}$.
