B→K(*)(K)over-bar(*) decays:: a new method for measuring the CP phase α

被引：13
|
作者：
Datta, A [1 ]
London, D [1 ]
机构：
[1] Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada
来源：
PHYSICS LETTERS B | 2002年 / 533卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1016/S0370-2693(02)01598-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a new method far measuring the CP phase alpha. It requires the measurement of the pure penguin decays B-d(0)(t) --> K-(*)(K) over bar ((*)) and B-s(0) --> K-(*)(K) over bar ((*)). The method is quite clean: we estimate the theoretical uncertainty to be at most 5%. By applying the method to several K-(*)(K) over bar ((*)) final states, a can be extracted with a fourfold ambiguity. An additional assumption reduces this ambiguity to twofold: {alpha, alpha + pi}. Since no pi(0) detection is needed, this method can be used at hadron colliders. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：65 / 74
页数：10
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