Re-examining sin 2β and Δmd from evolution of Bd0 mesons with decoherence

被引：16

作者：

Alok, Ashutosh Kumar ^{[1
]}

Banerjee, Subhashish ^{[1
]}

Sankar, S. Uma ^{[2
]}

机构：

[1] Indian Inst Technol Jodhpur, Jodhpur 342011, Rajasthan, India

[2] Indian Inst Technol, Mumbai 400076, Maharashtra, India

来源：

PHYSICS LETTERS B | 2015年 / 749卷

关键词：

B meson decays; Decoherence; ANGULAR-DISTRIBUTIONS; OSCILLATION; LIFETIME; SEARCH; B-0;

D O I：

10.1016/j.physletb.2015.07.061

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the time evolution of neutral meson systems, a perfect quantum coherence is usually assumed. The important quantities of the B-d(0) system, such as sin 2 beta and Delta m(d), are determined under this assumption. However, the meson system interacts with its environment. This interaction can lead to decoherence in the mesons even before they decay. In our formalism this decoherence is modelled by a single parameter lambda. It is desirable to re-examine the procedures of determination of sin 2 beta and Delta m(d) in meson systems with decoherence. We find that the present values of these two quantities are modulated by lambda. Re-analysis of B-d(0) data from B-factories and LHCb can lead to a clean determination of lambda, sin 2 beta and Delta m(d). (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：94 / 97

页数：4

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