| Strange b baryon production and lifetime in Z decays |
| ALEPH Collaboration
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| 1996
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发表期刊 | PHYSICS LETTERS B
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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.
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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
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学科领域 | Physics
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DOI | 10.1016/0370-2693(96)00925-2
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收录类别 | SCI
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WOS类目 | Physics, Multidisciplinary
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WOS记录号 | WOS:A1996VK91300062
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引用统计 |
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文献类型 | 期刊论文
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条目标识符 | http://ir.ihep.ac.cn/handle/311005/227661
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专题 | 实验物理中心
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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!.
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APA |
ALEPH Collaboration.(1996).Strange b baryon production and lifetime in Z decays.PHYSICS LETTERS B,384(1-4),#REF!.
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MLA |
ALEPH Collaboration."Strange b baryon production and lifetime in Z decays".PHYSICS LETTERS B 384.1-4(1996):#REF!.
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文件名:
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4079.pdf
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格式:
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Adobe PDF
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