.png){kind=icon}
返回
Reducing the error on α in B → ππ, ρρ, ρπ
.png){kind=icon}
OA
AI
DOI：10.1016/j.physletb.2004.11.082.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Theoretical errors in the extraction of alpha from B --> ( pi(+)pi(-), rho(+)rho(-) , rho(+/-)pi(-/+)) decays are usually given in terms of upper bounds on \alpha(eff) - alpha\ obtained from isospin or from SU(3) relations, where alpha(eff) is measured through CP asymmetries. We show that mild assumptions about magnitudes and strong phases of penguin and tree amplitudes (\P/T\ less than or equal to 1) and (\delta\ less than or equal to pi / 2 ) in B --> pipi and B --> rhorho, imply alpha(eff) > alpha, thus reducing by a factor two the error in alpha. Similarly, the assumptions \p+/-/t+/-\ less than or equal to 1, \delta_\ less than or equal to pi / 2 less than or equal to \delta(+)\ in B --> rhopi lead to a cancellation between two terms in alpha(eff) - alpha. Current data support these conditions, which are justified by both QCD-factorization and flavor SU(3). (C) 2004 Elsevier B.V. All rights reserved.
Keyword:
CP ASYMMETRIES
QCD FACTORIZATION
ISOSPIN ANALYSIS
DECAY MODES
K-ETA
PENGUINS
VIOLATION
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
4.5
论文数:
3.2W
被引数:
7.3W
机构
暂无机构信息
引用论文
Synthesis and characterization of carbon nanotubes supported Au nanoparticles encapsulated in various oxide shells.png)
RSC Adv.
RSC Adv.IF0
PREAI
分享收藏
Large direct CP violation in B0→π+π- and an enhanced branching ratio for B0→π0π0PHYSICS LETTERS BOAAI
PHYSICS LETTERS BIF4.5
OAAI分享收藏
查看更多内容