Search for charginos, neutralinos and gravitinos at LEP

被引：42

作者：

Abreu P. ^{[25
]}

Adam W. ^{[56
]}

Adye T. ^{[40
]}

Ajinenko I. ^{[45
]}

Alekseev G.D. ^{[20
]}

Alemany R. ^{[55
]}

Allport P.P. ^{[26
]}

Almehed S. ^{[28
]}

Amaldi U. ^{[13
]}

Amato S. ^{[53
]}

Andersson P. ^{[49
]}

Andreazza A. ^{[13
]}

Antilogus P. ^{[13
]}

Apel W.-D. ^{[21
]}

Arnoud Y. ^{[18
]}

Ǻsman B. ^{[49
]}

Augustin J.-E. ^{[29
]}

Augustinus A. ^{[34
]}

Baillon P. ^{[13
]}

Bambade P. ^{[23
]}

Barbi M. ^{[53
]}

Bardin D.Y. ^{[20
]}

Barker G. ^{[13
]}

Baroncelli A. ^{[37
]}

Barring O. ^{[28
]}

Bates M.J. ^{[40
]}

Battaglia M. ^{[19
]}

Baubillier M. ^{[27
]}

Baudot J. ^{[42
]}

Becks K.-H. ^{[58
]}

Begalli M. ^{[8
,9
,10
]}

Beilliere P. ^{[12
]}

Belokopytov Y. ^{[13
]}

Belous K. ^{[45
]}

Benvenuti A.C. ^{[7
]}

Berat C. ^{[18
]}

Berggren M. ^{[53
]}

Bertini D. ^{[29
]}

Bertrand D. ^{[2
,3
,4
]}

Besancon M. ^{[42
]}

Bianchi F. ^{[50
]}

Bigi M. ^{[50
]}

Bilenky M.S. ^{[20
]}

Billoir P. ^{[27
]}

Bizouard M.-A. ^{[23
]}

Bloch D. ^{[14
]}

Blume M. ^{[58
]}

Bonesini M. ^{[31
]}

Bonivento W. ^{[31
]}

Boonekamp M. ^{[42
]}

机构：

[1] Department of Physics and Astronomy, Iowa State University

[2] Physics Department, Univ. Instelling Antwerpen, B-2610 Wilrijk

[3] IIHE, ULB-VUB, B-1050 Brussels

[4] Faculté des Sciences, Univ. de l'Etat Mons, B-7000 Mons

[5] Physics Laboratory, University of Athens, GR-10680 Athens

[6] Department of Physics, University of Bergen, N-5007 Bergen

[7] Dipartimento di Fisica, Università di Bologna and INFN, I-40126 Bologna

[8] Centro Brasileiro de Pesquisas Físicas, RJ-22290 Rio de Janeiro

[9] Depto. de Física, Pont. Univ. Católica

[10] Inst. de Física, Univ. Estadual do Rio de Janeiro, Rio de Janeiro

[11] Comenius University, Faculty of Mathematics and Physics, SK-84215 Bratislava, Mlynska Dolina

[12] Collège de France, Lab. de Physique Corpusculaire, IN2P3-CNRS

[13] CERN

[14] Institut de Recherches Subatomiques, IN2P3-CNRS/ULP-BP20

[15] Institute of Nuclear Physics, N. C. S. R. Demokritos, GR-15310 Athens

[16] FZU, Inst. of Physics of the C.A.S. High Energy Physics Division, 180 40, Praha 8

[17] Dipartimento di Fisica, Università di Genova and INFN, I-16146 Genova

[18] Institut des Sciences Nucléaires, IN2P3-CNRS, F-38026 Grenoble Cedex

[19] Helsinki Institute of Physics, HIP, FIN-00014 Helsinki

[20] Joint Institute for Nuclear Research, 101 000 Moscow, Dubna, Head Post Office

[21] Institut für Experimentelle Kernphysik, Universität Karlsruhe, D-76128 Karlsruhe

[22] Institute of Nuclear Physics and University of Mining and Metalurgy, PL-30055 Krakow

[23] Université de Paris-Sud, Lab. de l'Accélérateur Linéaire, IN2P3-CNRS, F-91405 Orsay Cedex

[24] School of Physics and Chemistry, University of Lancaster

[25] LIP, IST, FCUL, P-1000 Lisboa Codex, Av. Elias Garcia

[26] Department of Physics, University of Liverpool, Liverpool L69 3BX

[27] LPNHE, IN2P3-CNRS, Universités Paris VI et VII, F-75252 Paris Cedex 05, Tour 33 (RdC)

[28] Department of Physics, University of Lund, S-22363 Lund

[29] Université Claude Bernard de Lyon, IPNL, IN2P3-CNRS

[30] Univ. d'Aix-Marseille II-CPP, IN2P3-CNRS

[31] Dipartimento di Fisica, Università di Milano and INFN, I-20133 Milan

[32] Niels Bohr Institute, DK-2100 Copenhagen 0

[33] NC, Nuclear Centre of MFF, Charles University, Areal MFF, 180 00, Praha 8

[34] NIKHEF, NL-1009 DB Amsterdam

[35] National Technical University, Physics Department, Zografou Campus

[36] Physics Department, University of Oslo, Blindern

[37] Dpto. Fisica, Univ. Oviedo, 33007 Oviedo, Avda. Calvo Sotelo, s/n

[38] Department of Physics, University of Oxford, Oxford OX1 3RH, Keble Road

[39] Dipartimento di Fisica, Università di Padova and INFN, I-35131 Padua

[40] Rutherford Appleton Laboratory, Chilton

[41] Dipartimento di Fisica, Università di Roma II and INFN, Tor Vergata

[42] CEA, DAPNIA/Service de Physique des Particules, CE-Saclay

[43] Istituto Superiore di Sanità, Ist. Naz. di Fisica Nucl. (INFN), I-00161 Rome

[44] Instituto de Fisica de Cantabria (CSIC-UC), 39006 Santander, Avda. los Castros, S/N

[45] Inst. for High Energy Physics, Protvino, (Moscow Region)

[46] J. Stefan Institute, SI-1000 Ljubljana

[47] Department of Astroparticle Physics, School of Environmental Sciences, Nova Gorica, SI-5000

[48] Department of Physics, University of Ljubljana

[49] Fysikum, Stockholm University, S-113 85 Stockholm

[50] Dipartimento di Fisica Sperimentale, Università di Torino and INFN, I-10125 Turin

来源：

The European Physical Journal C | 1998年 / 1卷 / 1-2期

关键词：

Minimal Supersymmetric Standard Model; Light Neutralino; Time Projection Chamber; Miss Transverse Momentum; DELPHI Collaboration;

D O I：

10.1007/BF01245794

中图分类号：

学科分类号：

摘要：

An update of the searches for charginos and neutralinos in DELPHI is presented, based mainly on recent data collected at centre-of-mass energies of 161 GeV and 172 GeV. No signal is found. For a sneutrino with mass above 300 GeV/c2 and a mass difference between the chargino and the lightest neutralino above 10 GeV/c2, the lower limit at 95% confidence level on the chargino mass ranges from 84.3 GeV/c2 to the kinematical limit (86.0 GeV/c2), depending on the mixing parameters. The limit decreases for lower chargino-neutralino mass differences. The limit in the case of a light sneutrino is 67.6 GeV/c2, provided that that there is no light sneutrino with a mass within 10 GeV/c2 below the chargino mass. Upper limits on neutralino pair production cross-sections of about a picobarn are derived. The (μ, M2) domain excluded in the MSSM-GUT scenario is determined by combining the neutralino and chargino searches. These results imply a limit on the mass of the lightest neutralino which, for a heavy sneutrino, is constrained to be above 24.9 GeV/c2 for tanβ ≥ 1. The search has also been extended to the case where the lightest neutralino is unstable and decays into a photon and a gravitino.

引用

页码：1 / 20

页数：19

共 45 条

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