A measurement of γ from the decays Bd0(t) → D()+D() and Bd0 → Ds()+D()-

被引：6

作者：

Albert, J

Datta, A

London, D

机构：

[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[2] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[3] Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada

来源：

PHYSICS LETTERS B | 2005年 / 605卷 / 3-4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/j.physletb.2004.11.046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, it was proposed to use measurements of B-d(0)(t)-->D(*)+D(*)- and B-d(0)-->D(*)+D(*)- decays to measure the CP phase gamma. In this Letter, we present the extraction of gamma using this method. We find that gamma is favored to lie in one of the ranges [19.4degrees-80.6degrees](+0degrees or 180degrees), [120degrees-147degrees](+0degrees or 180degrees), or [160degrees-174degrees](+0degrees or 180degrees) at 68% confidence level (the (+0degrees or 180degrees) represents an additional ambiguity for each range). These constraints come principally from the vector-vector final states; the vector-pseudoscalar decays improve the results only slightly. Although, with present data, the constraints disappear for larger confidence levels, this study does demonstrate the feasibility of the method. Strong constraints on gamma can be obtained with more data. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：335 / 343

页数：9

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A measurement of γ from the decays Bd0(t) → D(*)+D(*) and Bd0 → Ds(*)+D(*)-

A measurement of γ from the decays Bd0(t) → D()+D() and Bd0 → Ds()+D()-