A STUDY OF D-STAR+/--PRODUCTION IN Z0 DECAYS

被引：31

作者：

ALEXANDER, G

机构：

[1] Department of Physics and Astronomy, Tel Aviv University, Tel Aviv

[2] Department of Physics, Schuster Laboratory, The University, Manchester

[3] Cavendish Laboratory, Cambridge

[4] Enrico Fermi Institute, Department of Physics, University of Chicago, Chicago

[5] Dipartimento di Fisica dell' Università di Bologna, INFN

[6] Department of Physics, Carleton University, Colonel By Drive, Ottawa

[7] Laboratoire de Physique Nucléaire, Université de Montréal, Montreal

[8] Department of Physics and Astronomy, University of Maryland, College Park

[9] Queen Mary and Westfield College, University of London, London

[10] Fakultät für Physik, Albert Ludwigs Universität

[11] CERN, European Organisation for Particle Physics

[12] Rutherford Appleton Laboratory, Chilton, Didcot

[13] Physikalisches Institut, Universität Heidelberg

[14] Physikalisches Institut, Universität Bonn

[15] School of Physics and Space Research, University of Birmingham, Birmingham

[16] Department of Physics, Indiana University, Swain Hall West 117, Bloomington

[17] Brunel University, Uxbridge

[18] University College London, London

[19] Department of Physics, Technion - Israel Institute of Technology, Haifa

[20] Birkbeck College, London

[21] DPhPE, CEN Saclay

[22] Department of Physics, University of California, Riverside

[23] Centre for Research in Particle Physics, Carleton University, Ottawa

[24] Nuclear Physics Department, Weizmann Institute of Science, Rehovot

[25] International Center for Elementary Particle Physics, Department of Physics, University of Tokyo, Tokyo

[26] Kobe University, Kobe

[27] National Research Council of Canada, Herzberg Institute of Astrophysics, Ottawa

来源：

PHYSICS LETTERS B | 1991年 / 262卷 / 2-3期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(91)91577-I

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper an investigation of the production of D* +/- mesons produced in e+e- collisions at energies around the Z0 pole is presented. Based on 115 D* +/- mesons with chi-D* = 2E(D)*/E(cm) > 0.2 the properties of D* mesons produced in the reaction Z0 --> ccBAR are studied. Fixing the yield and the fragmentation function of bottom quarks to the values obtained at LEP using lepton tags, an average energy fraction of the D* +/- mesons from primary charmed quarks of <x-c --> D*> = 0.52 +/- 0.03 +/- 0.01 is found and GAMMA-Z0 --> ccBAR = (323 +/- 61 +/- 35) MeV is determined. The first error is the combined statistical and systematic error from this experiment, and the second the total error from other sources.

引用

页码：341 / 350

页数：10

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