Measurement of the triple gauge boson coupling αwφ from W W- production in e e- collisions at √s = 161 GeV

K Ackerstaff; G Alexander; J Allison; N Altekamp; K Ametewee; K Anderson; S Anderson; S Arcelli; S Asai; D Axen; G Azuelos; AH Ball; E Barberio; R Barlow; R Bartoldus; JR Batley; J Bechtluft; C Beeston; T Behnke; AN Bell; KW Bell; G Bella; S Bentvelsen; P Berlich; S Bethke; O Biebel; SD Bird; A Biguzzi; V Blobel; IJ Bloodworth; JE Bloomer; M Bobinski; 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; DG Charlton; D Chrisman; PEL Clarke; I Cohen; JE Conboy; OC Cooke; M Cuffiani; S Dado; C Dallapiccola; GM Dallavalle; S de Jong; LA del Pozo; K Desch; MS Dixit; E do Couto e Silva; M Doucet; E Duchovni; G Duckeck; IP Duerdoth; D Eatough; JEG Edwards; PG Estabrooks; HG Evans; M Evans; F Fabbri; M Fanti; P Fath; AA Faust; F Fiedler; M Fierro; HM Fischer; R Folman; DG Fong; M Foucher; A Fürtjes; P Gagnon; JW Gary; J Gascon; SM Gascon-Shotkin; NI Geddes; C Geich-Gimbel; T Geralis; G Giacomelli; P Giacomelli; R Giacomelli; V Gibson; WR Gibson; DM Gingrich; D Glenzinski; J Goldberg; MJ Goodrich; W Gorn; C Grandi; E Gross

Journal article

Measurement of the triple gauge boson coupling αwφ from W W- production in e e- collisions at √s = 161 GeV

K Ackerstaff, G Alexander, J Allison, N Altekamp, K Ametewee, K Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, R Barlow, R Bartoldus, JR Batley, 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 : 1997

DOI: 10.1016/S0370-2693(97)00162-7

Abstract

This letter describes a measurement of one of the anomalous triple gauge boson couplings using the first data recorded by the OPAL detector at LEP2. A total of 28 W-pair candidates have been selected for an integrated luminosity of 9.89±0.06 pb- recorded at a centre-of-mass energy of 161 GeV. We use these data to place constraints upon the coupling parameter αwφ. We analyse the predicted variation of the total cross-section for all observed channels and the distribution of kinematic variables in the semileptonic decay channels. We measure αwφ to be -0.61+0.73 -0.61 ±0.35, which is consistent with the Standard Model expectation of zero. © 1997 Published by Elsevier Science B.V.