论文标题
非扰动计算，用于独家半乳房的$ b _ {（s）} $衰减的形式。
Nonperturbative calculations of form factors for exclusive semileptonic $B_{(s)}$ decays
论文作者
论文摘要
从标准模型中得出的精确理论预测是搜索风味部门新物理学的关键要素。 $ b $ Quark的巨大质量和长寿，涉及$ b $ QUARK的流程。我们使用晶格模拟对半抑制$ b _ {（s）} $衰变执行非扰动QCD计算。我们从$ b_s \到d_s \ellν$和$ b_s \ to k \ellν$ emeptonic形式的确定结果呈现结果，并为我们的$ b \ toπ\ellν$计算提供了前景。此外，我们讨论了$ r $ -Ratios测试Lepton-Flovor普遍性的确定，并建议使用改进的比率。我们的计算基于RBC-IKQCD协作产生的2+1风味域壁IWASAKI量规配置，该配置的三个晶格间距$ 1/a = 1.78 $，$ 2.38 $和$ 2.79 \，$ 2.79 \，\，\ text {gev} $。使用相对论重的夸克动作模拟了$ b $ Quarks。
Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the $b$ quark make processes involving $b$ quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic $B_{(s)}$ decays. We present results from our determinations of $B_s\to D_s \ell ν$ and $B_s\to K \ell ν$ semileptonic form factors and provide an outlook for our $B\to π\ellν$ calculation. In addition we discuss the determination of $R$-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of $1/a = 1.78$, $2.38$, and $2.79\,\text{GeV}$. Heavy $b$-quarks are simulated using the relativistic heavy quark action.
