Measurement of the mass and width of the w boson in e e- collisions at 189 GeV: Opal collaboration

G Abbiendi; K Ackerstaff; C Ainsley; PF Åkesson; G Alexander; J Allison; KJ Anderson; S Arcelli; S Asai; SF Ashby; D Axen; G Azuelos; I Bailey; AH Ball; E Barberio; RJ Barlow; S Baumann; T Behnke; KW Bell; G Bella; A Bellerive; G Benelli; S Bentvelsen; S Bethke; O Biebel; IJ Bloodworth; O Boeriu; P Bock; J Böhme; D Bonacorsi; M Boutemeur; S Braibant; P Bright-Thomas; L Brigliadori; RM Brown; HJ Burckhart; J Cammin; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; DG Charlton; PEL Clarke; E Clay; I Cohen; OC Cooke; J Couchman; C Couyoumtzelis; RL Coxe; A Csilling; M Cuffiani; S Dado; GM Dallavalle; S Dallison; A de Roeck; E de Wolf; P Dervan; K Desch; B Dienes; MS Dixit; M Donkers; J Dubbert; E Duchovni; G Duckeck; IP Duerdoth; PG Estabrooks; E Etzion; F Fabbri; M Fanti; L Feld; P Ferrari; F Fiedler; I Fleck; M Ford; A Frey; A Fürtjes; DI Futyan; P Gagnon; JW Gary; G Gaycken; C Geich-Gimbel; G Giacomelli; P Giacomelli; D Glenzinski; J Goldberg; C Grandi; K Graham; E Gross; J Grunhaus; M Gruwé; PO Günther; C Hajdu; GG Hanson; M Hansroul; M Hapke; K Harder; A Harel; M Harin-Dirac; A Hauke

Journal article

Measurement of the mass and width of the w boson in e e- collisions at 189 GeV: Opal collaboration

G Abbiendi, K Ackerstaff, C Ainsley, PF Åkesson, G Alexander, J Allison, KJ Anderson, S Arcelli, S Asai, SF Ashby, D Axen, G Azuelos, I Bailey, AH Ball, E Barberio, RJ Barlow, S Baumann, T Behnke, KW Bell, G Bella Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | Published : 2001

DOI: 10.1016/S0370-2693(01)00131-9

Abstract

The mass and width of the W boson are determined in e+e- collisions at LEP using 183 pb-1 of data recorded at a centre-of-mass energy √s = 189 GeV with the OPAL detector. The invariant mass distributions from 970 W+W- → qqqq and 1118 W+W- → qqℓνℓ candidate events are used to measure the mass of the W boson, MW = 80.451±0.076 (stat.) ± 0.049 (syst.) GeV. A direct measurement of the width of the W boson gives ΓW = 2.09 ± 0.18 (stat.) ± 0.09 (syst.) GeV. The results are combined with previous OPAL results from 78 pb-1 of data recorded with √s from 161 to 183 GeV, to obtain: MW = 80.432 ± 0.066 (stat.) ± 0.045 (syst.) GeV, ΓW = 2.04 ± 0.16 (stat.) ± 0.09 (syst.) GeV. The consistency of the direc..

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