A study of W W-gamma events at LEP

G Abbiendi; C Ainsley; PF Akesson; G Alexander; J Allison; P Amaral; G Anagnostou; KJ Anderson; S Arcelli; S Asai; D Axen; G Azuelos; I Bailey; E Barberio; RJ Barlow; RJ Batley; P Bechtle; T Behnke; KW Bell; PJ Bell; G Bella; A Bellerive; G Benelli; S Bethke; O Biebel; O Boeriu; P Bock; M Boutemeur; S Braibant; L Brigliadori; RM Brown; K Buesser; HJ Burckhart; S Campana; RK Carnegie; B Caron; AA Carter; JR Carter; CY Chang; DG Charlton; A Csilling; M Cuffiani; S Dado; A De Roeck; EA De Wolf; K Desch; B Dienes; M Donkers; J Dubbert; E Duchovni; G Duckeck; IP Duerdoth; E Etzion; F Fabbri; L Feld; P Ferrari; E Fiedler; I Fleck; M Ford; A Frey; A Furtjes; P Gagnon; JW Gary; G Gaycken; C Geich-Gimbel; G Giacomelli; P Giacomelli; M Giunta; J Goldberg; E Gross; J Grunhaus; M Gruwe; PO Gunther; A Gupta; C Hajdu; M Hamann; GG Hanson; K Harder; A Harel; M Harin-Dirac; M Hauschild; CM Hawkes; R Hawkings; RJ Hemingway; C Hensel; G Herten; RD Heuer; JC Hill; K Hoffman; D Horvath; P Igo-Kemenes; K Ishii; H Jeremie; P Jovanovic; TR Junk; N Kanaya; J Kanzaki; G Karapetian; D Karlen; K Kawagoe; T Kawamoto; RK Keeler; RG Kellogg; BW Kennedy; DH Kim; K Klein; A Klier; S Kluth; T Kobayashi; M Kobel; S Komamiya; L Kormos; T Kramer; P Krieger; J von Krogh; K Kruger; T Kuhl; M Kupper; GD Lafferty; H Landsman; D Lanske; JG Layter; A Leins; D Lellouch; J Letts; L Levinson; J Lillich; SL Lloyd; FK Loebinger; J Lu; J Ludwig; A Macpherson; W Mader; S Marcellini; AJ Martin; G Masetti; T Mashimo; P Mattig; WJ McDonald; J McKenna; TJ McMahon; RA McPherson; F Meijers; W Menges; FS Merritt; H Mes; A Michelini; S Mihara; G Mikenberg; DJ Miller; S Moed; W Mohr; T Mori; A Mutter; K Nagai; I Nakamura; H Nanjo; HA Neal; R Nisius; SW O'Neale; A Oh; A Okpara; MJ Oreglia; S Orito; C Pahl; G Pasztor; JR Pater; GN Patrick; JE Pilcher; J Pinfold; DE Plane; B Poli; J Polok; O Pooth; M Przybycien; A Quadt; K Rabbertz; C Rembser; P Renkel; JM Roney; S Rosati; Y Rozen; K Runge; K Sachs; T Saeki; EKG Sarkisyan; AD Schaile; O Schaile; P Scharff-Hansen; J Schieck; T Schorner-Sadenius; M Schroder; M Schumacher; C Schwick; WG Scott; R Seuster; TG Shears; BC Shen; P Sherwood; G Siroli; A Skuja; AM Smith; R Sobie; S Soldner-Rembold; F Spano; A Stahl; K Stephens; D Strom; R Strohmer; S Tarem; M Tasevsky; RJ Taylor; R Teuscher; MA Thomson; E Torrence; D Toya; P Tran; I Trigger; Z Trocsanyi; E Tsur; MF Turner-Watson; I Ueda; B Ujvari; CF Vollmer; P Vannerem; R Vertesi; M Verzocchi; H Voss; J Vossebeld; D Waller; CP Ward; DR Ward; PM Watkins; AT Watson; NK Watson; PS Wells; T Wengler; N Wermes; D Wetterling; GW Wilson; JA Wilson; G Wolf; TR Wyatt; S Yamashita; D Zer-Zion; L Zivkovic

Journal article

A study of W W-gamma events at LEP

G Abbiendi, C Ainsley, PF Akesson, G Alexander, J Allison, P Amaral, G Anagnostou, KJ Anderson, S Arcelli, S Asai, D Axen, G Azuelos, I Bailey, E Barberio, RJ Barlow, RJ Batley, P Bechtle, T Behnke, KW Bell, PJ Bell Show all

PHYSICS LETTERS B | ELSEVIER SCIENCE BV | Published : 2004

DOI: 10.1016/j.physletb.2003.10.063

Abstract

A study of W+W- events accompanied by hard photon radiation, Eγ > 2.5 GeV, produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W-bosons and an isolated photon are selected from 681 pb-1 of data recorded at 180 GeV < √s < 209 GeV. From the sample of 187 selected W+W-γ candidates with photon energies greater than 2.5 GeV, the W+W-γ cross-section is determined at five values of √s. The results are consistent with the Standard Model expectation. Averaging over all energies, the ratio of the observed cross-section to the Standard Model expectation is R(data/SM) = 0.99 ± 0.09 ± 0.04, where the errors represent the statistical and systematic uncertainties resp..

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