Resonant structure and flavour tagging in the B pi(+/-) system using fully reconstructed B decays

	Resonant structure and flavour tagging in the B pi(+/-) system using fully reconstructed B decays
	ALEPH Collaboration
刊名	PHYSICS LETTERS B
	1998
卷号	425 期号:1--2 页码:215-226
关键词	MESONS IDENTIFICATION
通讯作者	Barate, R (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74019 Annecy Le Vieux, France.
英文摘要	Starting from a sample of four million hadronic Z decays collected with the ALEPH detector at LEP, 404 charged and neutral B mesons are fully reconstructed and used to look for resonant structure in the B pi. system. An excess of events is observed above the expected background in the B rr mass spectrum at a mass approximate to 5.7 GeV/c(2), consistent with the production and decay to B()pi of the B* states predicted by Heavy Quark Symmetry (HQS). In the framework of HQS, it is found that the mass of the B-2* State is (5739(-11)(+8)(stat)(-4)(+6)(syst))MeV/c(2) 2 and the relative production rate of the B * * system is BR(b --> B** --> B(*)pi)/BR(b --> Bu,d)= (31 +/- 9(stat)(-5)(+6)(syst))%. In the same sample of B mesons, significant B pi(+/-) charge-flavour correlations are observed, which may prove important for tagging the initial B state in future CP violation studies. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000074117900032
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/211916]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	ALEPH Collaboration. Resonant structure and flavour tagging in the B pi(+/-) system using fully reconstructed B decays[J]. PHYSICS LETTERS B,1998,425(1--2):215-226.
APA	ALEPH Collaboration.(1998).Resonant structure and flavour tagging in the B pi(+/-) system using fully reconstructed B decays.PHYSICS LETTERS B,425(1--2),215-226.
MLA	ALEPH Collaboration."Resonant structure and flavour tagging in the B pi(+/-) system using fully reconstructed B decays".PHYSICS LETTERS B 425.1--2(1998):215-226.