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PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE
ALEPH COLLABORATION
1991
发表期刊PHYSICS LETTERS B
卷号266期号:1--2页码:218-230
通讯作者DECAMP, D (reprint author), CNRS, IN2P3, LAB PHYS PARTICULES LAPP, F-74019 ANNECY LE VIEUX, FRANCE.
摘要In a sample of 190 000 hadronic Z decays, three signals of charm production are observed: two from the exclusive decays D0 --> K-pi+ and D*+ --> D0-pi+ --> K-pi+pi+ and one in the transverse-momentum distribution of soft hadrons relative to the nearest jet. The features of these signals are in good agreement with expectations based on the standard model and previous measurements of the branching fractions. The number of D* +/- --> K -/+ pi +/- pi +/- per hadronic decay of the Z is measured to be (5.11 +/- 0.34) x 10(-3), and the branching ratio B(D0 --> K-pi+) is (3.62 +/- 0.34 +/- 0.44)%. Charm hadronization has been studied. The average fraction of the beam energy carried by the D* meson is found to be c = 0.504(-0.017)+0.013 +/- 0.008, and implications of the measurements on the pseudoscalar-to-vector production ratio of charmed mesons are discussed.
关键词E+E ANNIHILATION D-STAR
学科领域Physics
DOI10.1016/0370-2693(91)90769-M
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:A1991GF21200036
引用统计
被引频次:50[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/311005/213872
专题实验物理中心
作者单位中国科学院高能物理研究所
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ALEPH COLLABORATION. PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE[J]. PHYSICS LETTERS B,1991,266(1--2):218-230.
APA ALEPH COLLABORATION.(1991).PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE.PHYSICS LETTERS B,266(1--2),218-230.
MLA ALEPH COLLABORATION."PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE".PHYSICS LETTERS B 266.1--2(1991):218-230.
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