Colour reconnection studies in e e-→W W- at √s = 183 GeV

G Abbiendi; K Ackerstaff; G Alexander; J Allison; N Altekamp; KJ Anderson; S Anderson; S Arcelli; S Asai; SF Ashby; D Axen; G Azuelos; AH Ball; E Barberio; RJ Barlow; R Bartoldus; JR Batley; S Baumann; J Bechtluft; T Behnke; KW Bell; G Bella; A Bellerive; S Bentvelsen; S Bethke; S Betts; O Biebel; A Biguzzi; SD Bird; V Blobel; IJ Bloodworth; P Bock; J Böhme; D Bonacorsi; M Boutemeur; S Braibant; P Bright-Thomas; L Brigliadori; RM Brown; HJ Burckhart; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; DG Charlton; D Chrisman; C Ciocca; PEL Clarke; E Clay; I Cohen; JE Conboy; OC Cooke; C Couyoumtzelis; RL Coxe; M Cuffiani; S Dado; GM Dallavalle; R Davis; S de Jong; A de Roeck; P Dervan; K Desch; B Dienes; MS Dixit; J Dubbert; E Duchovni; G Duckeck; IP Duerdoth; D Eatough; PG Estabrooks; E Etzion; F Fabbri; M Fanti; AA Faust; F Fiedler; M Fierro; I Fleck; R Folman; A Fürtjes; DI Futyan; P Gagnon; JW Gary; J Gascon; SM Gascon-Shotkin; G Gaycken; C Geich-Gimbel; G Giacomelli; P Giacomelli; V Gibson; WR Gibson; DM Gingrich; D Glenzinski; J Goldberg; W Gorn; C Grandi; K Graham; E Gross; J Grunhaus; M Gruwe

Journal article

Colour reconnection studies in e e-→W W- at √s = 183 GeV

G Abbiendi, K Ackerstaff, G Alexander, J Allison, N Altekamp, KJ Anderson, S Anderson, S Arcelli, S Asai, SF Ashby, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, S Baumann, J Bechtluft, T Behnke Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER | Published : 1999

DOI: 10.1016/S0370-2693(99)00309-3

Abstract

The predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of √s ≃ 182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W-→qq̄′qq̄′ events with the non-leptonic component of W+W-→qq̄′ℓv̄ℓ events. The scaled momentum distribution, its mean value, 〈xp〉, and that of the charged particle multiplicity, 〈nch〉, are measured and found to be consistent in the two channels. The measured differences are: Δ〈nch〉 = 〈nch4q〉 - 2〈nchqqℓv〉 = +0.7 ± 0.6 Δ〈xp〉 = 〈xp4q〉 - 〈xpqqℓv〉 = (-0.09 ± 0.09 ± 0.05) × 10-2 In addition, m..

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