Searching for new physics with Bs0 → K()0(K)over-bar()0 - A reappraisal

被引：11

作者：

Bhattacharya, Bhubanjyoti ^{[1
]}

Datta, Alakabha ^{[2
]}

Imbeault, Maxime ^{[3
]}

London, David ^{[1
]}

机构：

[1] Univ Montreal, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada

[2] Univ Mississippi, Dept Phys & Astron, Oxford, MS 38677 USA

[3] Cegep St Laurent, Dept Phys, Montreal, PQ H4L 3X7, Canada

来源：

PHYSICS LETTERS B | 2012年 / 717卷 / 4-5期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

QCD FACTORIZATION; DECAYS; POLARIZATION;

D O I：

10.1016/j.physletb.2012.09.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The effective phase 2 beta(eff)(s) can be extracted from the indirect CP-violating asymmetry in B-s(0) -> K-(*()0)(K) over bar (()*()0). In the standard model, 2 beta(eff)(s) is expected to vanish, and so its measurement can potentially reveal the presence of new physics. However, there is a theoretical error if the second amplitude, V-ub*VusPuc*' is non-negligible. Ciuchini, Pierini and Silvestrini (CPS) have suggested measuring P-uc in B-d(0) -> K-(*()0)(K) over bar (()*()0). and relating it to P-uc' using SU(3). For their choice of C-d and S-d, the direct and indirect CP asymmetries in B-d(0) -> K-(*()0)(K) over bar (()*()0), they find that the error on 2 beta(eff)(s) is very small, even allowing for 100% SU(3) breaking. In this Letter, we re-examine the CPS method, allowing for a large range of the B-d(0) -> K-(*()0)(K) over bar (()*()0) observables. We find that, if root C-d(2) + S-d(2) is measured to be less than or similar to 0.4-0.5, the theoretical error on 2 beta(eff)(s) is indeed small, 2-3 degrees. However, for other values of these observables, this error can be quite large, up to 14.9 degrees. This problem can be ameliorated if the values of SU(3) breaking were known, and we discuss different experimental ways of determining this quantity. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：403 / 408

页数：6

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Searching for new physics with Bs0 → K(*)0(K)over-bar(*)0 - A reappraisal

Searching for new physics with Bs0 → K()0(K)over-bar()0 - A reappraisal