A SEARCH FOR LEPTON FLAVOR VIOLATION IN Z(0) DECAYS

被引：30

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 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] Brunel University, Uxbridge

[17] University College London, London

[18] Birkbeck College, London

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

[20] DPhPE, CEN Saclay

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

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

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

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

[25] Japan and Kobe University

来源：

PHYSICS LETTERS B | 1991年 / 254卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(91)90437-U

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have searched for lepton flavour violation in about 14000 Z0 decays into collinear lepton pairs, recorded in an energy scan around the Z0 resonance. Decays of the type Z0 --> e-tau, Z0 --> mu-tau and Z0 -- e-mu have been considered. Observed candidates in the e-tau and mu-tau modes are consistent with expected Z0 --> tau+ tau- backgrounds; no candidates are observed for the e-mu-mode. We obtain limits (at 95% confidence level) on the branching rations for such Z0 decays of 7.2 X 10(-5) for the e-tau-decay, 35 X 10(-5) for the mu-tau-decay and 4.6 X 10(-5) for the e-mu-decay.

引用

页码：293 / 302

页数：10

共 20 条

[1]

AHMET K, IN PRESS NUCL INSTRU

[2] A SEARCH FOR ACOPLANAR PAIRS OF LEPTONS OR JETS IN Z0 DECAYS - MASS LIMITS ON SUPERSYMMETRIC PARTICLES [J].

AKRAWY, MZ ;

ALEXANDER, G ;

ALLISON, J ;

ALLPORT, PP ;

ANDERSON, KJ ;

ARMITAGE, JC ;

ARNISON, GTJ ;

ASHTON, P ;

AZUELOS, G ;

BAINES, JTM ;

BALL, AH ;

BANKS, J ;

BARKER, GJ ;

BARLOW, RJ ;

BATLEY, JR ;

BAVARIA, G ;

BECK, F ;

BELL, KW ;

BELLA, G ;

BETHKE, S ;

BIEBEL, O ;

BLOODWORTH, IJ ;

BOCK, P ;

BREUKER, H ;

BROWN, RM ;

BRUN, R ;

BUIJS, A ;

BURCKHART, HJ ;

CAPILUPPI, P ;

CARNEGIE, RK ;

CARTER, AA ;

CARTER, JR ;

CHANG, CY ;

CHARLTON, DG ;

CHRIN, JTM ;

COHEN, I ;

CONBOY, JE ;

COUCH, M ;

COUPLAND, M ;

CUFFIANI, M ;

DADO, S ;

DALLAVALLE, GM ;

DAVIES, OW ;

DENINNO, MM ;

DIECKMANN, A ;

DITTMAR, M ;

DIXIT, MS ;

DUCHESNEAU, D ;

DUCHOVNI, E ;

DUERDOTH, IP .

PHYSICS LETTERS B, 1990, 240 (1-2) :261-270

[3] ANALYSIS OF Z0 COUPLINGS TO CHARGED LEPTONS [J].

AKRAWY, MZ .

PHYSICS LETTERS B, 1990, 247 (2-3) :458-472

[4] SEARCH FOR LEPTON-NUMBER AND LEPTON-FLAVOR VIOLATION IN TAU-DECAYS [J].

ALBRECHT, H ;

BINDER, U ;

BOCKMANN, P ;

GLASER, R ;

HARDER, G ;

LEMBKEKOPPITZ, I ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

WURTH, R ;

YAGIL, A ;

DONKER, JP ;

DRESCHER, A ;

KAMP, D ;

MATTHIESEN, U ;

SCHECK, H ;

SPAAN, B ;

SPENGLER, J ;

WEGENER, D ;

GABRIEL, JC ;

SCHUBERT, KR ;

STIEWE, J ;

STRAHL, K ;

WALDI, R ;

WESELER, S ;

EDWARDS, KW ;

FRISKEN, WR ;

GILKINSON, DJ ;

GINGRICH, DM ;

KAPITZA, H ;

KIM, PCH ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCKENNA, JA ;

MCLEAN, KW ;

NILSSON, AW ;

ORR, RS ;

PADLEY, P ;

PARSONS, JA ;

PATEL, PM ;

PRENTICE, JD ;

SEYWERD, HCJ ;

SWAIN, JD ;

TSIPOLITIS, G ;

YOON, TS ;

YUN, JC ;

AMMAR, R ;

COPPAGE, D ;

DAVIS, R ;

KANEKAL, S .

PHYSICS LETTERS B, 1987, 185 (1-2) :228-232

[5]

ALLISON J, 1987, COMPUT PHYS COMMUN, V47, P171

[6]

ALTARELLI G, 1989, Z PHYSICS LEP, V2, P34

[7]

[Anonymous], 1989, Z PHYS C PART FIELDS, V44, P15, DOI 10.1007/BF01548582

[8] LEPTON FLAVOR VIOLATING DECAY OF THE Z0 IN THE SCALAR TRIPLET MODEL [J].

BERNABEU, J ;

SANTAMARIA, A .

PHYSICS LETTERS B, 1987, 197 (03) :418-422

[9] LEPTON FLAVOR NONCONSERVATION AT HIGH-ENERGIES IN A SUPERSTRING INSPIRED STANDARD MODEL [J].

BERNABEU, J ;

SANTAMARIA, A ;

VIDAL, J ;

MENDEZ, A ;

VALLE, JWF .

PHYSICS LETTERS B, 1987, 187 (3-4) :303-308

[10] SEARCH FOR THE DECAY MU+-]E+E+E- [J].

BERTL, W ;

EICHLER, R ;

ENGFER, R ;

FELAWKA, L ;

GRAB, C ;

HERMES, EA ;

KRAUS, N ;

LORDONG, N ;

MARTINO, J ;

PRUYS, HS ;

VANDERSCHAAF, A ;

WALTER, HK .

NUCLEAR PHYSICS B, 1985, 260 (01) :1-31

← 1 2 →