Search for a scalar top quark using the OPAL detector

R Akers; G Alexander; J Allison; KJ Anderson; S Arcelli; S Asai; A Astbury; D Axen; G Azuelos; AH Ball; E Barberio; RJ Barlow; R Bartoldus; JR Batley; G Beaudoin; A Beck; GA Beck; J Becker; C Beeston; T Behnke; KW Bell; G Bella; P Bentkowski; S Bentvelsen; P Berlich; S Bethke; O Biebel; IJ Bloodworth; P Bock; HM Bosch; M Boutemeur; S Braibant; P Bright-Thomas; RM Brown; A Buijs; HJ Burckhart; C Burgard; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; C Charlesworth; DG Charlton; SL Chu; PEL Clarke; JC Clayton; SG Clowes; I Cohen; JE Conboy; M Coupland; M Cuffiani; S Dado; C Dallapiccola; GM Dallavalle; C Darling; S De Jong; H Deng; M Dittmar; MS Dixit; E do Couto e Silva; JE Duboscq; E Duchovni; G Duckeck; IP Duerdoth; UC Dunwoody; PA Elcombe; PG Estabrooks; E Etzion; HG Evans; F Fabbri; B Fabbro; M Fanti; M Fierro; M Fincke-Keeler; HM Fischer; P Fischer; R Folman; DG Fong; M Foucher; H Fukui; A Fürtjes; P Gagnon; A Gaidot; JW Gary; J Gascon; NI Geddes; C Geich-Gimbel; SW Gensler; FX Gentit; T Geralis; G Giacomelli; P Giacomelli; R Giacomelli; V Gibson; WR Gibson; JD Gillies; J Goldberg; DM Gingrich; MJ Goodrick

Journal article

Search for a scalar top quark using the OPAL detector

R Akers, G Alexander, J Allison, KJ Anderson, S Arcelli, S Asai, A Astbury, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, G Beaudoin, A Beck, GA Beck, J Becker, C Beeston, T Behnke Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 1994

DOI: 10.1016/0370-2693(94)91470-2

Abstract

A search for a supersymmetric partner of the top quark (t̃1) has been performed by the OPAL experiment in e+e- collisions at LEP. The integrated luminosity of the data sample analysed was 69.1 pb-1, which corresponds to 1.68 × 106 produced Z0 → qq̄ events. No t̃1 candidates have been found. This study excludes the existence of the t̃1 with a mass below 45.1 GeV at 95% C.L., where the mixing angle of left- and right-handed partners is smaller than 0.85 rad or greater than 1.15 rad, and the mass difference between the t̃1 and the lightest neutralino is greater than 5 GeV. © 1994.