Determination of the LEP beam energy using radiative fermion-pair events

• DOI: 10.1016/j.physletb.2004.10.046
• Publication Date: 2004-11-06T18:01:23Z
• Authors: G. Abbiendi; C. Ainsley; P.F. Åkesson; G. Alexander; J. Allison; P. Amaral; G. Anagnostou; K.J. Anderson; S. Asai; D. Axen; I. Bailey; E. Barberio; T. Barillari; R.J. Barlow; R.J. Batley; P. Bechtle; T. Behnke; K.W. Bell; P.J. Bell; G. Bella; A. Bellerive; G. Benelli; S. Bethke; O. Biebel; O. Boeriu; P. Bock; M. Boutemeur; S. Braibant; R.M. Brown; H.J. Burckhart; S. Campana; P. Capiluppi; R.K. Carnegie; A.A. Carter; J.R. Carter; C.Y. Chang; D.G. Charlton; C. Ciocca; A. Csilling; M. Cuffiani; S. Dado; A. De Roeck; E.A. De Wolf; K. Desch; B. Dienes; M. Donkers; J. Dubbert; E. Duchovni; G. Duckeck; I.P. Duerdoth; E. Etzion; F. Fabbri; P. Ferrari; F. Fiedler; I. Fleck; M. Ford; A. Frey; P. Gagnon; J.W. Gary; C. Geich-Gimbel; G. Giacomelli; P. Giacomelli; M. Giunta; J. Goldberg; E. Gross; J. Grunhaus; M. Gruwé; P.O. Günther; A. Gupta; C. Hajdu; M. Hamann; G.G. Hanson; A. Harel; M. Hauschild; C.M. Hawkes; R. Hawkings; R.J. Hemingway; G. Herten; R.D. Heuer; J.C. Hill; K. Hoffman; D. Horváth; P. Igo-Kemenes; K. Ishii; H. Jeremie; P. Jovanovic; T.R. Junk; J. Kanzaki; D. Karlen; K. Kawagoe; T. Kawamoto; R.K. Keeler; R.G. Kellogg; B.W. Kennedy; S. Kluth; T. Kobayashi; M. Kobel; S. Komamiya; T. Krämer; P. Krieger; J. von Krogh; T. Kuhl; M. Kupper; G.D. Lafferty; H. Landsman; D. Lanske; D. Lellouch; J. Letts; L. Levinson; J. Lillich; S.L. Lloyd; F.K. Loebinger; J. Lu; A. Ludwig; J. Ludwig; W. Mader; S. Marcellini; A.J. Martin; G. Masetti; T. Mashimo; P. Mättig; J. McKenna; R.A. McPherson; F. Meijers; W. Menges; F.S. Merritt; H. Mes; N. Meyer; A. Michelini; S. Mihara; G. Mikenberg; D.J. Miller; W. Mohr; T. Mori; A. Mutter; K. Nagai; I. Nakamura; H. Nanjo; H.A. Neal; R. Nisius; S.W. O'Neale; A. Oh; M.J. Oreglia; S. Orito; C. Pahl; G. Pásztor; J.R. Pater; J.E. Pilcher; J. Pinfold; D.E. Plane; O. Pooth; M. Przybycień; A. Quadt; K. Rabbertz; C. Rembser; P. Renkel; J.M. Roney; A.M. Rossi; Y. Rozen; K. Runge; K. Sachs; T. Saeki; E.K.G. Sarkisyan; A.D. Schaile; O. Schaile; P. Scharff-Hansen; J. Schieck; T. Schörner-Sadenius; M. Schröder; M. Schumacher; R. Seuster; T.G. Shears; B.C. Shen; P. Sherwood; A. Skuja; A.M. Smith; R. Sobie; S. Söldner-Rembold; F. Spano; A. Stahl; D. Strom; R. Ströhmer; S. Tarem; M. Tasevsky; R. Teuscher; M.A. Thomson; E. Torrence; D. Toya; P. Tran; I. Trigger; Z. Trócsányi; E. Tsur; M.F. Turner-Watson; I. Ueda; B. Ujvári; C.F. Vollmer; P. Vannerem; R. Vértesi; M. Verzocchi; H. Voss; J. Vossebeld; C.P. Ward; D.R. Ward; P.M. Watkins; A.T. Watson; N.K. Watson; P.S. Wells; T. Wengler; N. Wermes; G.W. Wilson; J.A. Wilson; G. Wolf; T.R. Wyatt; S. Yamashita; D. Zer-Zion; L. Zivkovic
• Keywords: Nuclear and High Energy Physics; electron positron --> fermion antifermion photon; FOS: Physical sciences; electron positron: annihilation; 530; 7. Clean energy; 01 natural sciences; beam: energy; High Energy Physics - Experiment; 03 medical and health sciences; High Energy Physics - Experiment (hep-ex); 0302 clinical medicine; 0103 physical sciences; radiation: initial-state interaction; 189-209 GeV-cms; info:eu-repo/classification/ddc/530; Z0: hadronic decay; OPAL; 500; Electron-positron colliders (detn. of LEP beam energy using radiative fermion pair events recorded at center-of-mass energies from 183 to 209 GeV); Fermions; Hadrons; Leptons Role: FMU (Formation, unclassified), FORM (Formation, nonpreparative) (detn. of LEP beam energy using radiative fermion pair events recorded at center-of-mass energies from 183 to 209 GeV); CERN LEP Stor; electron positron: colliding beams; fermion: pair production; Z0: leptonic decay; Z0: electroproduction; experimental results

We present a determination of the LEP beam energy using "radiative return" fermion-pair events recorded at centre-of-mass energies from 183 GeV to 209 GeV. We find no evidence of a disagreement between the OPAL data and the LEP Energy Workings Group's standard calibration. Including the energy- averaged 11 MeV uncertainty in the standard determination, the beam energy we obtain from the OPAL data is higher than that obtained from the LEP calibration by 0+-34(stat.)+-27(syst.)MeV<br/>24 pages, 5 figures, Submitted to Phys. Letts. B<br/>