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arXiv 1702.06910hep-ph
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解析$\bar{B}^0 \to D^{(\ast)}τ^-\barν_τ$中的新物理

Analyzing New Physics in $\bar{B}^0 \to D^{(\ast)}τ^-\barν_τ$

Chien-Thang Tran, Mikhail A. Ivanov, Jürgen G. Körner

摘要:

讨论了排他衰变$\bar{B}^0 \to D^{(\ast)} τ^- \barν_τ$中标准模型(SM)之外可能出现的新物理(NP)效应.从一个模型独立的有效哈密顿量,包括非SM四费米算子,我们展示了如何获得不同的NP方案的实验约束,并研究它们对一个大的物理可观的影响。利用本课题组发展的协变受限夸克模型,在全运动学$q^2$范围内计算了$\bar{B}^0 \to D^{(\ast)}$跃迁形状因子.

英文摘要:

We discuss possible new physics (NP) effects beyond the standard model (SM) in the exclusive decays $\bar{B}^0 \to D^{(\ast)} τ^- \barν_τ$. Starting with a model-independent effective Hamiltonian including non-SM four-Fermi operators, we show how to obtain experimental constraints on different NP scenarios and investigate their effects on a large set of physical observables. The $\bar{B}^0 \to D^{(\ast)}$ transition form factors are calculated in the full kinematic $q^2$ range by employing the covariant confined quark model developed by our group.

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