Semileptonic B -meson decays to light pseudoscalar mesons on the HISQ ensembles
Semileptonic B -meson decays to light pseudoscalar mesons on the HISQ ensembles
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HISQ 系综上的半轻 B 介子衰变成光赝标量介子
DOI：
10.1051/epjconf/201817513024
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发表时间：
2018
影响因子：
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通讯作者：
Simone, J.N.
中科院分区：
文献类型：
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作者：
Gelzer, Zechariah;Bernard, C.;Tar, C. De;El-Khadra, AX;Gámiz, E.;Gottlieb, Steven;Kronfeld, Andreas S.;Liu, Yuzhi;Meurice, Y.;Simone, J.N.
我们报道了B介子在带电电流(B→πLV，BS→Klv)和中性电流(B→πL+L-，B→Kl+L-)下独占半轻子衰变形状因子的晶格QCD计算的现状。这些结果对于约束或揭示超越标准模型的物理学具有重要意义。这项工作使用了MILC的(2+1+1)-味系综，其中海夸克和轻价夸克的HISQ作用和费米实验室对b夸克的解释中的三叶草作用。模拟是在三个晶格间距下进行的，小到0.088 fm，既有物理的海夸克质量，也有非物理的海夸克质量。我们给出了相关函数拟合的初步结果。
We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of B mesons with both charged currents (B→πlv,Bs→Klv) and neutral currents (B→πl+l-,B→Kl+l-). The results are important for constraining or revealing physics beyond the Standard Model. This work uses MILC’s (2+1 + 1)-flavor ensembles with the HISQ action for the sea and light valence quarks and the clover action in the Fermilab interpretation for thebquark. Simulations are carried out at three lattice spacings down to 0.088 fm, with both physical and unphysical sea-quark masses. We present preliminary results for correlation-function fits.