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Production of charmed mesons in Z decays

Buskulic, D. and Finch, Alexander (1994) Production of charmed mesons in Z decays. Zeitschrift für Physik C Particles and Fields, 62 (1). pp. 1-14. ISSN 0170-9739

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Abstract

The production of charmed mesons D0(−) ,D ± , andD *± is studied in a sample of 478,000 hadronicZ decays. The production rates are measured to be Γ(Z→D∗±X)Γhad=0.187±0.015(exp.)±0.013(BR),\hfillΓ(Z→D±X)Γhad=0.251±0.026(exp.)±0.025(BR),\hfillΓ(Z→D0(−)X)Γhad=0.518±0.052(exp.)±0.035(BR),\hfill where the errors from this analysis are separated from those coming from theD branching ratios (BR). TheD *± momentum distribution is extracted separately for Z→ccˉ and Z→bbˉ 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→bbˉ contribution, the average fraction of the beam energy taken by aD * 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 forD **0 (D 1(2420)0 and/orD 2 *(2460)0) production is found in the D∗±π∓ channel, accounting for a fraction (18±5±2)% of allD *± production. The relative production of vector and pseudoscalar mesons is dicussed, together with the possible effects ofD ** production. Thec-quark forward-backwardZ-pole asymmetry is detrmined from that of high momentumD *± to beA FB 0,c =(7.7±4.4)%.

Item Type: Article
Journal or Publication Title: Zeitschrift für Physik C Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 64099
Deposited By: ep_importer_pure
Deposited On: 08 May 2013 16:48
Refereed?: Yes
Published?: Published
Last Modified: 20 Sep 2017 06:28
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/64099

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