论文标题
$ r（d^{（*）}）$的新物理学的间接界限
Indirect bounds on new physics for $R(D^{(*)})$
论文作者
论文摘要
讨论了$ b_c $生命周期的标准模型预测，以及如何改善它们的主要不确定性和策略。此外，提出了一种基于操作员产品扩展计算$ b_c $ lifetime的新方法。它依赖于$ b，\，d $和$ b_c $梅森衰减率的差异，在这种差异中，自由夸克的贡献取消，从而降低了理论预测的不确定性。
The Standard Model prediction of the $B_c$ lifetime is discussed, together with the dominant uncertainties and strategies on how to improve them. Furthermore, a new method to compute the $B_c$ lifetime based on the operator product expansion is proposed. It relies on differences of $B,\,D$ and $B_c$ meson decay rates, in which the free-quark contributions cancel out, reducing the uncertainty of the theory prediction.
