PRODUCTION OF CHARMED MESONS IN Z DECAYS
ALEPH Collaboration
刊名ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
1994
卷号62期号:1页码:1-14
学科分类Physics
其他题名1
通讯作者BUSKULIC, D (reprint author), LAB PHYS PARTICULES, CNRS, IN2P3, F-74019 ANNECY LE VIEUX, FRANCE.
文章类型Article
英文摘要The production of charmed mesons D0(-), D+/-, and D*+/- is studied in a sample of 478,000 hadronic Z decays. The production rates are measured to be GAMMA(Z --> D*+/- X)/GAMMA(had) = 0.187 +/- 0.015 (exp.) +/- 0.013 (BR), GAMMA(Z --> D+/- X) = 0.251 +/- 0.026 (exp.) +/- 0.025 (BR), GAMMA(Z --> D0(-) X)/GAMMA(had) = 0.518 +/- 0.052 (exp.) +/- 0.035 (BR), where the errors from this analysis are separated from those coming from the D branching ratios (BR). The D *+/momentum distribution is extracted separately for Z --> cc and Z --> bbBAR events with the help of event shape variables. It is consistent with the prediction of the JETSET Monte Carlo program after adjustment of the charm fragmentation function. Constraining the shape of the Z --> bbBAR contribution, the average fraction of the beam energy taken by a D* meson produced in the fragmentation of a charm quark is extracted by a parametric fit to be [X(E)]c = 0.495 +/- 0.011 +/- 0.007. Evidence for D**0 (D1(2420)0 and/or D2*(2460)0) production is found in the D*+/-pi-/+ channel, accounting for a fraction (18 +/- 5 +/- 2)% of all D*+/- production. The relative production of vector and pseudoscalar mesons is dicussed, together with the possible effects of D** production. The c-quark forward-backward Z-pole asymmetry is determined from that of high momentum D*+/- to be A(FB)0,c = (7.7 +/- 4.4)%.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:A1994NN31800001
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/311005/225393
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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ALEPH Collaboration. PRODUCTION OF CHARMED MESONS IN Z DECAYS[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1994,62(1):1-14.
APA ALEPH Collaboration.(1994).PRODUCTION OF CHARMED MESONS IN Z DECAYS.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,62(1),1-14.
MLA ALEPH Collaboration."PRODUCTION OF CHARMED MESONS IN Z DECAYS".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 62.1(1994):1-14.
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