A STUDY OF HEAVY FLAVOR PRODUCTION USING MUONS IN HADRONIC Z0 DECAYS

被引：56

作者：

AKRAWY, MZ

机构：

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

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

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

[4] Cavendish Laboratory, Cambridge

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

[6] Department of Physics, Carleton University, Ottawa, Ont. K1S 5B6, Colonel By Drive

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

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

[9] Fakultät für Physik, Albert Ludwigs Universität

[10] CERN, European Organisation for Particle Physics

[11] Rutherford Appleton Laboratory, Chilton, Didcot

[12] Physikalisches Institut, Universität Heidelberg

[13] Physikalisches Institut, Universität Bonn

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

[15] Department of Physics, Indiana University, Bloomington, IN 47405

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

[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 / 263卷 / 02期

关键词：

D O I：

10.1016/0370-2693(91)90606-Q

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using muon candidates in 133 000 hadronic decays of the Z0, recorded by the OPAL detector at LEP, we have measured the fraction of events containing semi-leptonic decays of b flavoured hadrons. An analysis based on fitting the shape of the momentum and transverse momentum distributions of the muon candidates gave the result: (GAMMA-(Z0 --> bbBAR)/(GAMMA-(Z0 --> hadrons)) x br (b --> mu) = 0.0226 +/- 0.0007 +/- 0.0013, and also yielded: (GAMMA-(Z0 --> ccBAR)/GAMMA-(Z0 --> hadrons)) x Br(c --> mu) = 0.0176 +/- 0.0025 +/- 0.0042. Using the charge of the muon and the angle of the event thrust axis with respect to the electron beam, in a b-enriched event sample, we measured the forward-backward asymmetry for Z0 --> bbBAR decays. Without correction for B0BBAR0 mixing, the asymmetry was found to be A(b)FB = 0.072 +/- 0.042 +/- 0.010.

引用

页码：311 / 324

页数：14

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