Beaujean Frederik, Bobeth Christoph, van Dyk Danny
C2PAP, Universe Cluster, Ludwig-Maximilians-Universität München, Garching, Germany.
Universe Cluster and Institute for Advanced Study, Technische Universität München, Garching, Germany.
Eur Phys J C Part Fields. 2014;74(6):2897. doi: 10.1140/epjc/s10052-014-2897-0. Epub 2014 Jun 3.
The available data on [Formula: see text] decays are in good agreement with the Standard Model when permitting subleading power corrections of about [Formula: see text] at large hadronic recoil. Constraining new-physics effects in [Formula: see text], [Formula: see text], [Formula: see text], the data still demand the same size of power corrections as in the Standard Model. In the presence of chirality-flipped operators, all but one of the power corrections reduce substantially. The Bayes factors are in favor of the Standard Model. Using new lattice inputs for [Formula: see text] form factors and under our minimal prior assumption for the power corrections, the favor shifts toward models with chirality-flipped operators. We use the data to further constrain the hadronic form factors in [Formula: see text] and [Formula: see text] transitions.
当允许在大强子反冲时进行约[公式：见文本]的次主导幂次修正时，关于[公式：见文本]衰变的现有数据与标准模型高度吻合。在[公式：见文本]、[公式：见文本]、[公式：见文本]中限制新物理效应时，数据仍要求与标准模型中相同大小的幂次修正。在手征翻转算符存在的情况下，除一个幂次修正外，其他所有幂次修正都大幅降低。贝叶斯因子支持标准模型。使用[公式：见文本]形状因子的新晶格输入，并在我们对幂次修正的最小先验假设下，支持转向具有手征翻转算符的模型。我们利用这些数据进一步限制[公式：见文本]和[公式：见文本]跃迁中的强子形状因子。
