CERN Accelerating science

Article
Report number hep-ex/0309013 ; CERN-EP-2003-043 ; CERN-EP-2003-043
Title A Study of $W^{+}W^{-}\gamma$ Events at LEP
Related titleLarge Electron Positron
Author(s)

Abbiendi, G. ; Ainsley, C. ; Akesson, P.F. ; Alexander, G. ; Allison, John ; Amaral, P. ; Anagnostou, G. ; Anderson, K.J. ; Arcelli, S. ; Asai, S. ; Axen, D. ; Azuelos, G. ; Bailey, I. ; Barberio, E. ; Barlow, R.J. ; Batley, R.J. ; Bechtle, P. ; Behnke, T. ; Bell, Kenneth Watson ; Bell, P.J. ; Bella, G. ; Bellerive, A. ; Benelli, G. ; Bethke, S. ; Biebel, O. ; Boeriu, O. ; Bock, P. ; Boutemeur, M. ; Braibant, S. ; Brigliadori, L. ; Brown, Robert M. ; Buesser, K. ; Burckhart, H.J. ; Campana, S. ; Carnegie, R.K. ; Caron, B. ; Carter, A.A. ; Carter, J.R. ; Chang, C.Y. ; Charlton, David G. ; Csilling, A. ; Cuffiani, M. ; Dado, S. ; De Roeck, A. ; De Wolf, E.A. ; Desch, K. ; Dienes, B. ; Donkers, M. ; Dubbert, J. ; Duchovni, E. ; Duckeck, G. ; Duerdoth, I.P. ; Etzion, E. ; Fabbri, F. ; Feld, L. ; Ferrari, P. ; Fiedler, F. ; Fleck, I. ; Ford, M. ; Frey, A. ; Furtjes, A. ; Gagnon, P. ; Gary, John William ; Gaycken, G. ; Geich-Gimbel, C. ; Giacomelli, G. ; Giacomelli, P. ; Giunta, Marina ; Goldberg, J. ; Gross, E. ; Grunhaus, J. ; Gruwe, M. ; Gunther, P.O. ; Gupta, A. ; Hajdu, C. ; Hamann, M. ; Hanson, G.G. ; Harder, K. ; Harel, A. ; Harin-Dirac, M. ; Hauschild, M. ; Hawkes, C.M. ; Hawkings, R. ; Hemingway, R.J. ; Hensel, C. ; Herten, G. ; Heuer, R.D. ; Hill, J.C. ; Hoffman, Kara Dion ; Horvath, D. ; Igo-Kemenes, P. ; Ishii, K. ; Jeremie, H. ; Jovanovic, P. ; Junk, T.R. ; Kanaya, N. ; Kanzaki, J. ; Karapetian, G. ; Karlen, D. ; Kawagoe, K. ; Kawamoto, T. ; Keeler, R.K. ; Kellogg, R.G. ; Kennedy, B.W. ; Kim, D.H. ; Klein, K. ; Klier, A. ; Kluth, S. ; Kobayashi, T. ; Kobel, M. ; Komamiya, S. ; Kormos, Laura L. ; Kramer, T. ; Krieger, P. ; von Krogh, J. ; Kruger, K. ; Kuhl, T. ; Kupper, M. ; Lafferty, G.D. ; Landsman, H. ; Lanske, D. ; Layter, J.G. ; Leins, A. ; Lellouch, D. ; Lettso, J. ; Levinson, L. ; Lillich, J. ; Lloyd, S.L. ; Loebinger, F.K. ; Lu, J. ; Ludwig, J. ; Macpherson, A. ; Mader, W. ; Marcellini, S. ; Martin, A.J. ; Masetti, G. ; Mashimo, T. ; Mattig, Peter ; McDonald, W.J. ; McKenna, J. ; McMahon, T.J. ; McPherson, R.A. ; Meijers, F. ; Menges, W. ; Merritt, F.S. ; Mes, H. ; Michelini, A. ; Mihara, S. ; Mikenberg, G. ; Miller, D.J. ; Moed, S. ; Mohr, W. ; Mori, T. ; Mutter, A. ; Nagai, K. ; Nakamura, I. ; Nanjo, H. ; Neal, H.A. ; Nisius, R. ; O'Neale, S.W. ; Oh, A. ; Okpara, A. ; Oreglia, M.J. ; Orito, S. ; Pahl, C. ; Pasztor, G. ; Pater, J.R. ; Patrick, G.N. ; Pilcher, J.E. ; Pinfold, J. ; Plane, David E. ; Poli, B. ; Polok, J. ; Pooth, O. ; Przybycien, M. ; Quadt, A. ; Rabbertz, K. ; Rembser, C. ; Renkel, P. ; Roney, J.M. ; Rosati, S. ; Rozen, Y. ; Runge, K. ; Sachs, K. ; Saeki, T. ; Sarkisyan, E.K.G. ; Schaile, A.D. ; Schaile, O. ; Scharff-Hansen, P. ; Schieck, J. ; Schoerner-Sadenius, Thomas ; Schroder, Matthias ; Schumacher, M. ; Schwick, C. ; Scott, W.G. ; Seuster, R. ; Shears, T.G. ; Shen, B.C. ; Sherwood, P. ; Siroli, G. ; Skuja, A. ; Smith, A.M. ; Sobie, R. ; Soldner-Rembold, S. ; Spano, F. ; Stahl, A. ; Stephens, K. ; Strom, David M. ; Strohmer, R. ; Tarem, S. ; Tasevsky, M. ; Taylor, R.J. ; Teuscher, R. ; Thomson, M.A. ; Torrence, E. ; Toya, D. ; Tran, P. ; Trigger, I. ; Trocsanyi, Z. ; Tsur, E. ; Turner-Watson, M.F. ; Ueda, I. ; Ujvari, B. ; Vollmer, C.F. ; Vannerem, P. ; Vertesi, R. ; Verzocchi, M. ; Voss, H. ; Vossebeld, J. ; Waller, D. ; Ward, C.P. ; Ward, D.R. ; Watkins, P.M. ; Watson, A.T. ; Watson, N.K. ; Wells, P.S. ; Wengler, T. ; Wermes, N. ; Wetterling, D. ; Wilson, G.W. ; Wilson, J.A. ; Wolf, G. ; Wyatt, T.R. ; Yamashita, S. ; Zer-Zion, D. ; Zivkovic, Lidija

Affiliation (School of Physics and Astronomy, Univ. Birmingham) ; (Dipartimento di Fisica dell Univ. Bologna and INFN) ; (Physikalisches Institut, Univ. Bonn) ; (Department of Physics, Univ. California) ; (Cavendish Laboratory, Cambridge) ; (Ottawa-Carleton Institute for Phys., Dept. Phys., Carleton Univ.) ; (CERN) ; (Enrico Fermi Institute and Department of Physics, Univ. Chicago) ; (Fakultat fur Physik, Albert Ludwigs Univ., Freiburg) ; (Physikalisches Institut, Univ. Heidelberg) ; (Indiana Univ., Department of Physics) ; (Queen Mary and Westfield College, Univ. London) ; (Technische Hochschule Aachen, III Physikalisches Institut, Aachen) ; (Univ. College London) ; (Department of Physics, Schuster Laboratory, Manchester) ; (Department of Physics, Univ. Maryland) ; (Laboratoire de Physique Nucleaire, Univ. Montreal) ; (Univ. Oregon, Department of Physics) ; (CLRC Rutherford Appleton Laboratory) ; (Department of Physics, Technion-Israel Institute of Technology) ; (Department of Physics and Astronomy, Tel Aviv Univ.) ; (International Centre for Elementary Particle Phys. and Dept. Phys., Univ. Tokyo) ; (Kobe Univ.) ; (Particle Physics Department, Weizmann Institute of Science) ; (Univ. Hamburg/DESY) ; (Univ. Victoria, Department of Physics) ; (Univ. British Columbia, Department of Physics) ; (Univ. Alberta, Department of Physics) ; (Research Institute for Particle and Nuclear Physics, Budapest) ; (Institute of Nuclear Research, Hungary) ; (Ludwigs-Maximilians-Univ. Munchen) ; (Max-Planck-Institut fur Physik, Munich) ; (Yale Univ.,Department of Physics) ; (TRIUMF)
Publication 2003-12-05
Imprint 11 Jul 2003
Number of pages 20
Note 26 pages, 6 figures, Submitted to Phys. Letts B Report-no: CERN-EP/2003-043
In: Phys. Lett. B 580 (2004) 17-36
DOI 10.1016/j.physletb.2003.10.063
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LEP ; OPAL
Abstract A study of W+W- events accomanied by hard photon radiation 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 < sqrt(s) < 209 GeV. For these data, 187 W+W- candidates are selected with photon energies greater than 2.5 GeV. The selected events are used to determine the W+ W- gamma cross section at five values of sqrt(s). The results are consistent with the Standard Model expectation. These data provide constraints on the related O(alpha) systematic uncertainties on the measurement of the W boson mass at LEP. Finally, the data are used to derive 95% C.L. upper limits on possible anomalous contributions to the W+ W- gamma gamma and W+ W- Z0 gamma vertices.
Copyright/License publication: © 2003-2025 Elsevier B.V. (License: CC-BY-3.0)

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