Strange b baryon production and lifetime in Z decays

doi:10.1016/0370-2693(96)00925-2

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	Strange b baryon production and lifetime in Z decays
	ALEPH Collaboration
	1996
发表期刊	PHYSICS LETTERS B
卷号	384 期号:1-4 页码:#REF!
通讯作者	Buskulic, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES, CNRS, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
摘要	In a data sample of approximately four million hadronic Z decays recorded with the ALEPH detector from 1990 to 1995, a search for the strange b baryon Xi(b) is performed with a study of Xi-lepton correlations. Forty-four events with same sign Xi(-)l(-) combinations are found whereas 8.4 are expected based on the rate of opposite sign Xi(-)l(+) combinations. This significant excess is interpreted as evidence for Xi(b) semileptonic decays. The measured product branching ratio is Br(b-->Xi(b))xBr(Xi(b)-->X(c)Xl(-)<(nu)over bar (l)>)xBr(X(c)-->Xi(-)X')=(5.4+/-1.1(stat)+/-0.8(syst))x10(-4) per lepton species, averaged over electrons and muons, with X(c) a charmed baryon. The Xi(b) lifetime is measured to be tau(Xi b)=1.35(-0.28)(+0.37)(stat)(-0.17)(+0.15)(syst) ps.
文章类型	Article
学科领域	Physics
DOI	10.1016/0370-2693(96)00925-2
收录类别	SCI
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:A1996VK91300062
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ihep.ac.cn/handle/311005/227661
专题	实验物理中心
推荐引用方式 GB/T 7714	ALEPH Collaboration. Strange b baryon production and lifetime in Z decays[J]. PHYSICS LETTERS B,1996,384(1-4):#REF!.
APA	ALEPH Collaboration.(1996).Strange b baryon production and lifetime in Z decays.PHYSICS LETTERS B,384(1-4),#REF!.
MLA	ALEPH Collaboration."Strange b baryon production and lifetime in Z decays".PHYSICS LETTERS B 384.1-4(1996):#REF!.

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