Electroweak effects in the extraction of the CKM angle γ from B → Dπ Dpdecays

被引：4
作者：
Brod, Joachim [1 ]
机构：
[1] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence & Mainz Inst Theoret Ph, D-55099 Mainz, Germany
来源：
PHYSICS LETTERS B | 2015年 / 743卷
基金：
欧洲研究理事会;
关键词：
QCD FACTORIZATION; CP VIOLATION; DECAYS;
D O I：
10.1016/j.physletb.2015.02.022
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The angle gamma of the standard CKM unitarity triangle can be determined from tree-level B-meson decays essentially without hadronic uncertainties. We calculate the second-order electroweak corrections for the B -> D pi modes and show that their impact on the determination of gamma could be enhanced by an accidental cancellation of poorly known hadronic matrix elements. However, we do not expect the resulting shift in gamma to exceed vertical bar delta gamma(D pi)/gamma vertical bar less than or similar to O(10(-4)). (C) 2015 The Author. Published by Elsevier B.V.
引用
收藏
页码：56 / 60
页数：5
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