论文标题
半乳房$ b \ to d^{（\ ast）} \ellν$ decay形式使用Oktay-Kronfeld Action
Semileptonic $B \to D^{(\ast)} \ellν$ Decay Form Factors using the Oktay-Kronfeld Action
论文作者
论文摘要
我们报告了$ \ bar {b} \计算半蛋白质形式的最新进展到d^\ ast \ ell \barν$和$ \ bar {b} \ to d \ ell \barν$衰减，使用Oktay-kronfeld（OK）的动作（ok）底部和Charm Quarks。我们在重夸克有效的功率中使用二阶顺序计数$ \ MATHCAL {O}（λ^2）$在这项工作中改善电流。 HISQ动作用于轻视夸克。我们分析了四个$ 2+1+1 $ -flavor MILC HISQ合奏用$ a \ of 0.09 \，\ Mathrm {fm} $，$ 0.12 \，\ Mathrm {fm} $和$m_π\ $m_π\ \ 220 \，\ 220 \，\ m atrm {mev} $，$ 310 $，$ 310 \，\ 310 \，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\，\ sme {ME. $ a09m220 $，$ a09m310 $，$ a12m220 $，$ a 12m310 $。 $ b \ to d^\ ast \ellν$衰减的初步结果报告了零后坐力（$ w = 1 $）的形式$ h_ {a_1}（w）$。 $ b \ to d \，\ellν$衰减的初步结果也报告了$ h_ \ pm（w）$在运动范围内$ 1 <w <1.3 $。
We report recent progress in calculating semileptonic form factors for the $\bar{B} \to D^\ast \ell \barν$ and $\bar{B} \to D \ell \barν$ decays using the Oktay-Kronfeld (OK) action for bottom and charm quarks. We use the second order in heavy quark effective power counting $\mathcal{O}(λ^2)$ improved currents in this work. The HISQ action is used for the light spectator quarks. We analyzed four $2+1+1$-flavor MILC HISQ ensembles with $a\approx 0.09\,\mathrm{fm}$, $0.12\,\mathrm{fm}$ and $M_π\approx 220\,\mathrm{MeV}$, $310\,\mathrm{MeV}$: $a09m220$, $a09m310$, $a12m220$, $a12m310$. Preliminary results for $B\to D^\ast\ellν$ decays form factor $h_{A_1}(w)$ at zero recoil ($w=1$) are reported. Preliminary results for $B \to D\,\ellν$ decays form factors $h_\pm(w)$ over a kinematic range $1<w<1.3$ are reported as well.
