Search for chargino and neutralino production using the OPAL detector at √s = 130-136 GeV at LEP

G Alexander; J Allison; N Altekamp; K Ametewee; KJ Anderson; S Anderson; S Arcelli; S Asai; D Axen; G Azuelos; AH Bain; E Barberio; RJ Barlow; R Bartoldus; JR Batley; G Beaudoin; J Bechtluft; C Beeston; T Behnke; AN Bell; KW Bell; G Bella; S Bentvelsen; P Berlich; S Bethke; O Biebel; V Blobel; IJ Bloodworth; JE Bloomer; P Bock; HM Bosch; M Boutemeur; BT Bouwens; S Braibant; RM Brown; HJ Burckhart; C Burgard; R Bürgin; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; C Charlesworth; DG Charlton; D Chrisman; SL Chu; PEL Clarke; I Cohen; JE Conboy; OC Cooke; M Cuffiani; S Dado; C Dallapiccola; GM Dallavalle; C Darling; S de Jong; LA del Pozo; MS Dixit; E do Couto e Silva; E Duchovni; G Duckeck; IP Duerdoth; JEG Edwards; PG Estabrooks; HG Evans; M Evans; F Fabbri; P Fath; F Fiedler; M Fierro; HM Fischer; R Folman; DG Fong; M Foucher; H Fukui; A Fürtjes; P Gagnon; A Gaidot; JW Gary; J Gascon; SM Gascon-Shotkin; NI Geddes; C Geich-Gimbel; SW Gensler; FX Gentit; T Geralis; G Giacomelli; P Giacomelli; R Giacomelli; V Gibson; WR Gibson; DM Gingrich; J Goldberg; MJ Goodrick; W Gorn; C Grandi; E Gross; M Gruwé; C Hajdu

Journal article

Search for chargino and neutralino production using the OPAL detector at √s = 130-136 GeV at LEP

G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Bain, E Barberio, RJ Barlow, R Bartoldus, JR Batley, G Beaudoin, J Bechtluft, C Beeston, T Behnke, AN Bell Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 1996

DOI: 10.1016/0370-2693(96)00301-2

Abstract

A search for charginos and neutralinos, predicted by supersymmetric theories, has been performed using a data sample of 2.6 pb-1 at a centre-of-mass energy of √s = 130 GeV and 2.6 pb-1 at 136 GeV collected with the OPAL detector at LEP during November 1995. No candidate events were observed. The 95% C.L. lower limit on the lightest chargino mass in the Minimal Supersymmetric Standard Model is 65.4 GeV if the universal scalar mass m0 is greater than 1 TeV, and 58.7 GeV for the smallest m0 compatible with slepton and sneutrino mass limits obtained at centre-of-mass energies near the Z peak. These limits were obtained under the conditions that the lightest chargino is heavier than the lightest ..

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