MEASUREMENT OF THE Z0 LINE-SHAPE PARAMETERS AND THE ELECTROWEAK COUPLINGS OF CHARGED LEPTONS

被引：244

作者：

ALEXANDER, G

机构：

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

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

[3] Cavendish Laboratory, Cambridge

[4] Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, 60637, IL

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

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

[7] Department of Physics, University of Victoria, PO Box 1700, Victoria, V8W 2Y2, BC

[8] Department of Physics, University of British Columbia, 6224 Agriculture Road, Vancouver

[9] Laboratoire de Physique Nucléaire, Université de Montréal, Montréal, H3C 3J7, Quebec

[10] Department of Physics and Astronomy, University of Maryland, College Park, 20742, MD

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

[12] Fakultät für Physik, Albert Ludwigs Universität, Freiburg

[13] CERN, European Organisation for Particle Physics, Geneva 23

[14] Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, Oxfordshire

[15] Physikalisches Institut, Universität Heidelberg, Heidelberg

[16] Physikalisches Institut, Universität Bonn, Bonn 1

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

[18] Department of Physics, Indiana University, Swain Hall West 117, Bloomington, 47405, IN

[19] Brunel University, Uxbridge, UB8 3PH, Middlesex

[20] University College London, London

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

[22] Birkbeck College, London

[23] DPhPE, CEN Saclay, Gif-sur-Yvette

[24] Department of Physics, University of California, Riverside, 92521, CA

[25] Centre for Research in Particle Physics, Carleton University, Ottawa, K1S 5B6, Ontario

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

[27] International Centre for Elementary Particle Physics and Dept of Physics, University of Tokyo, Tokyo

[28] Kobe University, Kobe

[29] Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, K1A 0R6, Ontario

[30] Univ. of Victoria, and TRIUMF

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1991年 / 52卷 / 02期

关键词：

D O I：

10.1007/BF01560437

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report on an improved measurement of the mass of the Z0 boson, its total width and its partial decay widths into hadrons and leptons, as well as the effective axial vector and vector couplings to charged leptons. These measurements are based on a data set of approximately 160 000 hadronic Z0 decays and 18 000 decays into electrons, muons and taus, recorded by the OPAL experiment at centre of mass energies near the mass of the Z0. The total width and the partial widths to visible final states, derived from the measured cross sections, are used to extract the invisible width. The effective couplings of the Z0 to charged leptons are studied using measurements of the lepton pair cross sections and forward-backward asymmetries at the different centre of mass energy points of the Z0 scan. The implications of our results in the context of the Standard Model are discussed.

引用

页码：175 / 207

页数：33

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