标题： $B\to D^\ast\ellν$在非零反冲处 显示英文标题

标题： $B\to D^\ast\ellν$ at non-zero recoil

摘要： 我们展示了对非零动量转移下$B\rightarrow D^\ast\ell\nu$衰变形式因子分析的初步盲结果。 我们的分析包括15个MILC asqtad系综，其中包含$N_f=2+1$种海夸克风味，格点间距从$a\approx 0.15$飞米降至$0.045$飞米。 价轻夸克采用asqtad作用量，而$b$和$c$夸克则使用费米实验室作用量。 我们讨论我们的结果将对$\left|V_{cb}\right|$和$R(D^\ast)$的影响。 显示英文摘要

摘要： We present preliminary blinded results from our analysis of the form factors for $B\rightarrow D^\ast\ell\nu$ decay at non-zero recoil. Our analysis includes 15 MILC asqtad ensembles with $N_f=2+1$ flavors of sea quarks and lattice spacings ranging from $a\approx 0.15$ fm down to $0.045$ fm. The valence light quarks employ the asqtad action, whereas the $b$ and $c$ quarks are treated using the Fermilab action. We discuss the impact that our results will have on $\left|V_{cb}\right|$ and $R(D^\ast)$.