OBSERVATION OF THE SEMILEPTONIC DECAYS OF BS AND LAMBDA-B HADRONS AT LEP

doi:10.1016/0370-2693(92)91654-R

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	OBSERVATION OF THE SEMILEPTONIC DECAYS OF BS AND LAMBDA-B HADRONS AT LEP
	ALEPH Collaboration
	1992
发表期刊	PHYSICS LETTERS B
卷号	294 期号:1 页码:#REF!
通讯作者	BUSKULIC, D (reprint author), CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,PHYS PARTICULES LAB,F-74019 ANNECY LE VIEUX,FRANCE.
摘要	In 450000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of D(s)-l+ and LAMBDA(c)+l- combinations have been measured. 16.0 +/- 4.3 D(s)-l+ combinations were observed in the D(s)- --> phipi- channel and 17.0 +/- 4.5 combinations were observed in the D(s)- --> K*0K- channel. 21.0 +/- 5.0 LAMBDA(c)+l- combinations were observed, with the LAMBDA(c)+ reconstructed in the decay mode LAMBDA(c)+ --> pK-pi+. These events provide evidence for the decays B(s) --> D(s)-Xl+nu and LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR. Assuming that the B(s) and LAMBDA(b) semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(bBAR --> B(s))Br(B(s) --> D(s)-Xl+nu) = 0.040 +/- 0.011 +0.010/-0.012, Br(b --> LAMBDA(b))Br(LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR) = 0.030 +/- 0.007 +/- 0.009.
文章类型	Article
学科领域	Physics
DOI	10.1016/0370-2693(92)91654-R
收录类别	SCI
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:A1992JW98800026
引用统计	被引频次：39[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/311005/226488
专题	实验物理中心
推荐引用方式 GB/T 7714	ALEPH Collaboration. OBSERVATION OF THE SEMILEPTONIC DECAYS OF BS AND LAMBDA-B HADRONS AT LEP[J]. PHYSICS LETTERS B,1992,294(1):#REF!.
APA	ALEPH Collaboration.(1992).OBSERVATION OF THE SEMILEPTONIC DECAYS OF BS AND LAMBDA-B HADRONS AT LEP.PHYSICS LETTERS B,294(1),#REF!.
MLA	ALEPH Collaboration."OBSERVATION OF THE SEMILEPTONIC DECAYS OF BS AND LAMBDA-B HADRONS AT LEP".PHYSICS LETTERS B 294.1(1992):#REF!.

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