LIMITS ON NEUTRAL HEAVY-LEPTON PRODUCTION FROM Z0 DECAY

被引:53
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, Colonel By Drive, Ottawa
[7] Rutherford Appleton Laboratory, Chilton, Didcot
[8] Laboratoire de Physique Nucléaire, Université de Montréal, Montreal
[9] Department of Physics and Astronomy, University of Maryland, College Park
[10] Fakultät für Physik, Albert Ludwigs Universität
[11] CERN, European Organization for Particle Physics
[12] Physikalisches Institut, Universität Heidelberg
[13] Physikalisches Institut, Universität Bonn
[14] School of Physics and Space Research, University of Birmingham, Birmingham
[15] Dipartimento di Fisica dell'Università di Bologna, INFN
[16] University College London, London
[17] Birkbeck College, London
[18] Department of Physics, Technion - Israel Institute of Technology, Haifa
[19] DPhPE, CEN Saclay
[20] Department of Physics, University of California, Riverside
[21] National Research Council of Canada, Herzberg Institute of Astrophysics, Ottawa
[22] Nuclear Physics Department, Weizmann Institute of Science, Rehovot
[23] International Center for Elementary Particle Physics, Department of Physics, University of Tokyo
[24] Brunel University, Uxbridge
[25] Kobe University, Kobe
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(90)90924-U
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Data taken with the OPAL detector at LEP during a scan of the Z0 resonance were searched for evidence of neutral heavy leptons that decay via mixing. Four different decay modes of the neutral heavy lepton are considered: L0→eW*, L0→μW*, L0→τW*, and L0→vZ*. No evidence is seen of a neutral heavy lepton signal; branching fraction limits in the range of 10-3-10-4 are set for Z0→L0L0 and for Z0→vL0 (orvL0) relative to Z0→hadrons. © 1990.
引用
收藏
页码:448 / 457
页数:10
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