PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE

	PRODUCTION AND DECAY OF CHARMED MESONS AT THE Z-RESONANCE
	ALEPH COLLABORATION
刊名	PHYSICS LETTERS B
	1991
卷号	266 期号:1--2 页码:218-230
关键词	E+E ANNIHILATION D-STAR
通讯作者	DECAMP, D (reprint author), CNRS, IN2P3, LAB PHYS PARTICULES LAPP, F-74019 ANNECY LE VIEUX, FRANCE.
英文摘要	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.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:A1991GF21200036
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213872]
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. 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.