A DIRECT SEARCH FOR NEUTRALINO PRODUCTION AT LEP

被引：34

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] 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 Organisation 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, Tokyo

[24] Kobe University, Kobe

[25] Brunel University, Uxbridge

来源：

PHYSICS LETTERS B | 1990年 / 248卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(90)90041-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search has been performed for the production of neutralinos (χ, χ′) in e+e- annihilation at energies near the Z0 pole. No evidence for these particles was found either in searches for events with two acoplanar jets, low visible energy, and missing pt (sensitive to Z0→χχ′→χχff) or in searches for single-photon events (sensitive to Z0→χχ′→χχγ). Model independent upper limits (at the 95% CL) on the branching ratio for the decay mode Z0 →χχ′ of a few 10-4 are obtained for most of the range of neutralino masses that is kinematically accessible at LEP energies. Upper limits on the mixing factor of neutralinos are also placed as a function of the neutralino masses. © 1990.

引用

页码：211 / 219

页数：9

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