Measurement of the b quark forward-backward asymmetry around the Z(0) peak using an inclusive tag

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; IJ Bloodworth; O Boeriu; P Bock; D Bonacorsi; 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; GM Dallavalle; S Dallison; A De Roeck; EA De Wolf; K Desch; B Dienes; M Donkers; J Dubbert; E Duchovni; G Duckeck; IP Duerdoth; E Elfgren; E Etzion; F Fabbri; L Feld; P Ferrari; F 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; J Hauschildt; CM Hawkes; R Hawkings; RJ Hemingway; C Hensel; G Herten; RD Heuer; JC Hill; K Hoffman; RJ Homer; D Horvath; R Howard; P Huntemeyer; P Igo-Kemenes; K Ishii; H Jeremie; P Jovanovic; TR Junk; N Kanaya; J Kanzaki; G Karapetian; D Karlen; V Kartvelishvili; 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 Kormas; RV Kowalewski; T Kramer; T Kress; P Krieger; J von Krogh; D Krop; K Kruger; 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; TE Marchant; AJ Martin; JP Martin; G Masetti; T Mashimo; P Mattig; WJ McDonald; J McKenna; TJ McMahon; RA McPherson; F Meijers; P Mendez-Lorenzo; 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; 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; H Rick; JM Roney; S Rosati; Y Rozen; K Runge; K Sachs; T Saeki; O Sahr; 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; CH Shepherd-Themistocleous; P Sherwood; G Siroli; A Skuja; AM Smith; R Sobie; S Soldner-Rembold; S Spagnolo; 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; T Trefzger; A Tricoli; I Trigger; Z Trocsanyi; E Tsur; MF Turner-Watson; I Ueda; B Ujvari; B Vachon; CF Vollmer; P Vannerem; 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

Measurement of the b quark forward-backward asymmetry around the Z(0) peak using an inclusive tag

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 | Published : 2002

DOI: 10.1016/S0370-2693(02)02594-7

Abstract

The b quark forward-backward asymmetry has been measured using hadronic Z0 decays collected by the OPAL experiment at LEP. Z0 → bb̄ decays were selected using a combination of secondary vertex and lepton tags, and the sign of the b quark charge was determined using an inclusive tag based on jet, vertex and kaon charges. The results, corrected to the quark level, are: AFBb= 0.0582 ± 0.0153 ± 0.0012 at √s = 89.50 GeV, AFBb= 0.0977 ± 0.0036 ± 0.0018 at √s = 91.26 GeV, AFBb= 0.1221 ± 0.0123 ± 0.0025 at √s = 92.91 GeV, where the first error is statistical and the second systematic in each case. Within the framework of the Standard Model, the result is interpreted as a measurement of the effective..

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