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Constraints on anomalous quartic gauge boson couplings from nu(nu)over-bar gamma gamma and q(q)over-bar gamma gamma events at CERN LEP2

Abbiendi, G and Ainsley, C and Akesson, P F and Alexander, G and Allison, J and Amaral, P and Anagnostou, G and Anderson, K J and Asai, S and Axen, D and Azuelos, G and Bailey, I and Barberio, E and Barillari, T and Barlow, R J and Batley, R J and Bechtle, P and Behnke, T and Bell, K W and Bell, P J and Bella, G and Bellerive, A and Benelli, G and Bethke, S and Biebel, O and Boeriu, O and Bock, P and Boutemeur, M and Braibant, S and Brigliadori, L and Brown, R M and Buesser, K and Burckhart, H J and Campana, S and Carnegie, R K and Carter, A A and Carter, J R and Chang, C Y and Charlton, D G and Ciocca, C and Csilling, A and Cuffiani, M and Dado, S and De Roeck, A and De Wolf, E A and Desch, K and Dienes, B and Donkers, M and Dubbert, J and Duchovni, E and Duckeck, G and Duerdoth, I P and Etzion, E and Fabbri, F and Feld, L and Ferrari, P and Fiedler, F and Fleck, I and Ford, M and Frey, A and Gagnon, P and Gary, J W and Gaycken, G and Geich-Gimbel, C and Giacomelli, G and Giacomelli, P and Giunta, M and Goldberg, J and Gross, E and Grunhaus, J and Gruwe, M and Gunther, P O and Gupta, A and Hajdu, C and Hamann, M and Hanson, G G and Harel, A and Hauschild, M and Hawkes, C M and Hawkings, R and Hemingway, R J and Herten, G and Heuer, R D and Hill, J C and Hoffman, K and Horvath, D and Igo-Kemenes, P and Ishii, K and Jeremie, H and Jovanovic, P and Junk, T R and Kanaya, N and Kanzaki, J and Karlen, D and Kawagoe, K and Kawamoto, T and Keeler, R K and Kellogg, R G and Kennedy, B W and Kluth, S and Kobayashi, T and Kobel, M and Komamiya, S and Kramer, T and Krieger, P and von Krogh, J and Kruger, K and Kuhl, T and Kupper, M and Lafferty, G D and Landsman, H and Lanske, D and Layter, J G and Lellouch, D and Letts, J and Levinson, L and Lillich, J and Lloyd, S L and Loebinger, F K and Lu, J and Ludwig, A and Ludwig, J and Mader, W and Marcellini, S and Martin, A J and Masetti, G and Mashimo, T and Mattig, P and McKenna, J and McPherson, R A and Meijers, F and Menges, W and Merritt, F S and Mes, H and Meyer, N and Michelini, A and Mihara, S and Mikenberg, G and Miller, D J and Moed, S and Mohr, W and Mori, T and Mutter, A and Nagai, K and Nakamura, I and Nanjo, H and Neal, H A and Nisius, R and O'Neale, S W and Oh, A and Oreglia, M J and Orito, S and Pahl, C and Pasztor, G and Pater, J R and Pilcher, J E and Pinfold, J and Plane, D E and Poli, B and Pooth, O and Przybycien, M and Quadt, A and Rabbertz, K and Rembser, C and Renkel, P and Roney, J M and Rozen, Y and Runge, K and Sachs, K and Saeki, T and Sarkisyan, E K G and Schaile, A D and Schaile, O and Scharff-Hansen, P and Schieck, J and Schorner-Sadenius, T and Schroder, M and Schumacher, M and Scott, W G and Seuster, R and Shears, T G and Shen, B C and Sherwood, P and Skuja, A and Smith, A M and Sobie, R and Soldner-Rembold, S and Spano, F and Stahl, A and Strom, D and Strohmer, R and Tarem, S and Tasevsky, M and Teuscher, R and Thomson, M A and Torrence, E and Toya, D and Tran, P and Trigger, I and Trocsanyi, Z and Tsur, E and Turner-Watson, M F and Ueda, I and Ujvari, B and Vollmer, C F and Vannerem, P and Vertesi, R and Verzocchi, M and Voss, H and Vossebeld, J and Ward, C P and Ward, D R and Watkins, P M and Watson, A T and Watson, N K and Wells, P S and Wengler, T and Wermes, N and Wilson, G W and Wilson, J A and Wolf, G and Wyatt, T R and Yamashita, S and Zer-Zion, D and Zivkovic, L and , OPAL Collaboration (2004) Constraints on anomalous quartic gauge boson couplings from nu(nu)over-bar gamma gamma and q(q)over-bar gamma gamma events at CERN LEP2. Physical Review, 70 (3). -. ISSN 0556-2821

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    Anomalous quartic couplings between the electroweak gauge bosons may contribute to the nu(nu) over bar gammagamma and q (q) over bar gammagamma 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 nu(nu) over bar gammagamma and q (q) over bar gammagamma events in which the two photons are reconstructed within the detector acceptance. The cross section for the process e(+)e(-)-->q (q) over bar gammagamma is measured. Averaging over all energies, the ratio of the observed e(+)e(-)-->q (q) over bar gammagamma 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 nu(nu) over bar gammagamma and q (q) over bar gammagamma data are used to constrain possible anomalous W(+)W(-)gammagamma and ZZgammagamma couplings. Combining with previous OPAL results from the W(+)W(-)gamma final state, the 95% confidence level limits on the anomalous coupling parameters a(0)(Z), a(c)(Z), a(0)(W) and a(c)(W) are found to be -0.007 GeV-2<a(0)(Z)/Lambda(2)<0.023 GeV-2, -0.029 GeV-2<a(c)(Z)/Lambda(2)<0.029 GeV-2, -0.020 GeV-2<a(0)(W)/Lambda(2)<0.020 GeV-2, -0.052 GeV-2<a(c)(W)/Lambda(2)<0.037 GeV-2, where Lambda is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented.

    Item Type: Article
    Journal or Publication Title: Physical Review
    Additional Information: © 2004 The American Physical Society
    Subjects: UNSPECIFIED
    Departments: Faculty of Science and Technology > Physics
    ID Code: 52312
    Deposited By: ep_importer_pure
    Deposited On: 12 Jan 2012 14:49
    Refereed?: Yes
    Published?: Published
    Last Modified: 09 Apr 2014 23:00
    Identification Number:

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