New physics contributions in B → πτ(ν)over-bar and B → τ(ν)over-bar

被引：8

作者：

Tanaka, Minoru ^{[1
]}

Watanabe, Ryoutaro ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan

[2] Univ, Ctr Theoret Phys, Inst Basic Sci IBS, 34051 Daejeon, South Korea

来源：

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2017年 / 2017卷 / 01期

关键词：

D O I：

10.1093/ptep/ptw175

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study possible new physics contributions in B -> pi tau(nu) over bar and B -> tau(nu) over bar employing the model-independent effective Lagrangian that describes the quark-level transition b -> pi tau(nu) over bar at low energies. The decay rate of B -> pi tau(nu) over bar and its theoretical uncertainty are evaluated using the B -> pi form factors given by recent lattice QCD studies. Comparing theoretical results with the current experimental data, B(B -> pi tau(nu) over bar) < 2.5x10(-4) and B(B -> tau<(nu)over bar>(tau)) = (1.14 +/- 0.22) x 10(-4), we obtain constraints on the Wilson coefficients that quantify potential new physics. We also present the expected sensitivity of the SuperKEKB/Belle II experiment.

引用

页数：14

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