Constraints on anomalous quartic gauge boson couplings from ννγγ and qq̄γγ events at CERN LEP2

G. Abbiendi, C. Ainsley, P. F. Åkesson, G. Alexander, J. Allison, P. Amaral, G. Anagnostou, K. J. Anderson, S. Asai, D. Axen, G. Azuelos, I. Bailey, E. Barberio, T. Barillari, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. Bell, P. J. BellG. Bella, A. Bellerive, G. Benelli, S. Bethke, O. Biebel, O. Boeriu, P. Bock, M. Boutemeur, S. Braibant, L. Brigliadori, R. M. Brown, K. Buesser, H. J. Burckhart, S. Campana, 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, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, P. Gagnon, J. W. Gary, G. Gaycken, 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. Horvath, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. Jovanovic, T. R. Junk, N. Kanaya, 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. Kramer, P. Krieger, J. von Krogh, K. Kruger, T. Kuhl, M. Kupper, G. D. Lafferty, H. Landsman, D. Lanske, J. G. Layter, 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, S. Moed, 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, B. Poli, O. Pooth, M. Przybycień, A. Quadt, K. Rabbertz, C. Rembser, P. Renkel, J. M. Roney, 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, W. G. Scott, 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

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Abstract

Anomalous quartic couplings between the electroweak gauge bosons may contribute to the ννγγ and qq̄γγ final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at center-of-mass energies up to 209 GeV. Event selections identify ννγγ and qq̄γγ events in which the two photons are reconstructed within the detector acceptance. The cross section for the process e+e-→qq̄γγ is measured. Averaging over all energies, the ratio of the observed e +e-→qq̄γγ cross section to the standard model expectation is R(data/SM) = 0.92±0.07±0.04, where the errors represent the statistical and systematic uncertainties respectively. The ννγγ and qq̄γγ data are used to constrain possible anomalous W+W- γγ and ZZγγ couplings. Combining with previous OPAL results from the W + W- γ final state, the 95% confidence level limits on the anomalous coupling parameters a0Z, a cZ, a0W and ac W are found to be -0.007 GeV-2<a0 Z2 <0.023 GeV-2, -0.029 GeV -2<acZ2<0.029 GeV-2, -0.020 GeV-2<a0W/ Λ2<0.020 GeV-2, -0.052 GeV -2<acW2<0.037 GeV-2, where Λ is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented.

Original languageEnglish
Article number032005
Pages (from-to)032005-1-032005-11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number3
DOIs
Publication statusPublished - 2004 Aug 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Allison, J., Amaral, P., Anagnostou, G., Anderson, K. J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., ... Zivkovic, L. (2004). Constraints on anomalous quartic gauge boson couplings from ννγγ and qq̄γγ events at CERN LEP2. Physical Review D - Particles, Fields, Gravitation and Cosmology, 70(3), 032005-1-032005-11. [032005]. https://doi.org/10.1103/PhysRevD.70.032005