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Measurement of the W+W- gamma cross-section and first direct limits on anomalous electroweak quartic gauge couplings

Abbiendi, G and Ackerstaff, K and Akesson, P F and Alexander, G and Allison, J and Anderson, K J and Arcelli, S and Asai, S and Ashby, S F and Axen, D and Azuelos, G and Bailey, I and Ball, A H and Barberio, E and Barlow, R J and Batley, J R and Baumann, S and Behnke, T and Bell, K W and Bella, G and Bellerive, A and Bentvelsen, S and Bethke, S and Betts, S and Biebel, O and Biguzzi, A and Bloodworth, I J and Bock, P and Bohme, J and Boeriu, O and Bonacorsi, D and Boutemeur, M and Braibant, S and Bright-Thomas, P and Brigliadori, L and Brown, R M and Burckhart, H J and Capiluppi, P and Carnegie, R K and Carter, A A and Carter, J R and Chang, C Y and Charlton, D G and Chrisman, D and Ciocca, C and Clarke, P E L and Clay, E and Cohen, I and Conboy, J E and Cooke, O C and Couchman, J and Couyoumtzelis, C and Coxe, R L and Cuffiani, M and Dado, S and Dallavalle, G M and Dallison, S and Davis, R and de Roeck, A and Dervan, P and Desch, K and Dienes, B and Dixit, M S and Donkers, M and Dubbert, J and Duchovni, E and Duckeck, G and Duerdoth, I P and Estabrooks, P G and Etzion, E and Fabbri, F and Fanfani, A and Fanti, M and Faust, A A and Feld, L and Ferrari, P and Fiedler, F and Fierro, M and Fleck, I and Frey, A and Furtjes, A and Futyan, D I and Gagnon, P and Gary, J W and Gaycken, G and Geich-Gimbel, C and Giacomelli, G and Giacomelli, P and Gingrich, D M and Glenzinski, D and Goldberg, J and Gorn, W and Grandi, C and Graham, K and Gross, E and Grunhaus, J and Gruwe, M and Hajdu, C and Hanson, G G and Hansroul, M and Hapke, M and Harder, K and Harel, A and Hargrove, C K and Harin-Dirac, M and Hauschild, M and Hawkes, C M and Hawkings, R and Hemingway, R J and Herten, G and Heuer, R D and Hildreth, M D and Hill, J C and Hobson, P R and Hocker, A and Hoffman, K and Homer, R J and Honma, A K and Horvath, D and Hossain, K R and Howard, R and Huntemeyer, P and Igo-Kemenes, P and Imrie, D C and Ishii, K and Jacob, F R and Jawahery, A and Jeremie, H and Jimack, M and Jones, C R and Jovanovic, P and Junk, T R and Kanaya, N and Kanzaki, J and Karapetian, G and Karlen, D and Kartvelishvili, V and Kawagoe, K and Kawamoto, T and Kayal, P I and Keeler, R K and Kellogg, R G and Kennedy, B W and Kim, D H and Klier, A and Kobayashi, T and Kobel, M and Kokott, T P and Kolrep, M and Komamiya, S and Kowalewski, R V and Kress, T and Krieger, P and von Krogh, J and Kuhl, T and Kupper, M and Kyberd, P and Lafferty, G D and Landsman, H and Lanske, D and Lauber, J and Lawson, I and Layter, J G and Lellouch, D and Letts, J and Levinson, L and Liebisch, R and Lillich, J and List, B and Littlewood, C and Lloyd, A W and Lloyd, S L and Loebinger, F K and Long, G D and Losty, M J and Lu, J and Ludwig, J and Macchiolo, A and Macpherson, A and Mader, W and Mannelli, M and Marcellini, S and Marchant, T E and Martin, A J and Martin, J P and Martinez, G and Mashimo, T and Mattig, P and McDonald, W J and McKenna, J and Mckigney, E A and McMahon, T J and McPherson, R A and Meijers, F and Mendez-Lorenzo, P and Merritt, F S and Mes, H and Meyer, I and Michelini, A and Mihara, S and Mikenberg, G and Miller, D J and Mohr, W and Montanari, A and Mori, T and Nagai, K and Nakamura, I and Neal, H A and Nisius, R and O'Neale, S W and Oakham, F G and Odorici, F and Ogren, H O and Okpara, A and Oreglia, M J and Orito, S and Pasztor, G and Pater, J R and Patrick, G N and Patt, J and Perez-Ochoa, R and Petzold, S and Pfeifenschneider, P and Pilcher, J E and Pinfold, J and Plane, D E and Poli, B and Polok, J and Przybycien, M and Quadt, A and Rembser, C and Rick, H and Robins, S A and Rodning, N and Roney, J M and Rosati, S and Roscoe, K and Rossi, A M and Rozen, Y and Runge, K and Runolfsson, O and Rust, D R and Sachs, K and Saeki, T and Sahr, O and Sang, W M and Sarkisyan, E K G and Sbarra, C and Schaile, A D and Schaile, O and Scharff-Hansen, P and Schieck, J and Schmitt, S and Schoning, A and Schroder, M and Schumacher, M and Schwick, C and Scott, W G and Seuster, R and Shears, T G and Shen, B C and Shepherd-Themistocleous, C H and Sherwood, P and Siroli, G P and Skuja, A and Smith, A M and Snow, G A and Sobie, R and Soldner-Rembold, S and Spagnolo, S and Sproston, M and Stahl, A and Stephens, K and Stoll, K and Strom, D and Strohmer, R and Surrow, B and Talbot, S D and Taras, P and Tarem, S and Teuscher, R and Thiergen, M and Thomas, J and Thomson, M A and Torrence, E and Towers, S and Trefzger, T and Trigger, I and Trocsanyi, Z and Tsur, E and Turner-Watson, M F and Ueda, I and Van Kooten, R and Vannerem, P and Verzocchi, M and Voss, H and Wackerle, F and Waller, D 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 Wetterling, D and White, J S and Wilson, G W and Wilson, J A and Wyatt, T R and Yamashita, S and Zacek, V and Zer-Zion, D and , OPAL Collaboration (1999) Measurement of the W+W- gamma cross-section and first direct limits on anomalous electroweak quartic gauge couplings. Physics Letters B, 471 (2-3). pp. 293-307. ISSN 0370-2693

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Abstract

A study of W+W- events accompanied by hard photon radiation produced in e(+)e(-) collisions at LEP is presented. Events consistent with two on-shell W-bosons and an isolated photon are selected from 183 pb(-1) of data recorded at root s = 189 GeV. From these data, 17 W+W- gamma candidates are selected with photon energy greater than 10 GeV, consistent with the Standard Model expectation. These events are used to measure the e(+)e(-) --> W+W- gamma cross-section within a set of geometric and kinematic cuts, <(sigma)over cap>(WW gamma) = 136 +/- 37 +/- 8 fb, where the first error is statistical and the second systematic. The photon energy spectrum is used to set the first direct, albeit weak, limits on possible anomalous contributions to the W+W- gamma gamma and W+W- gamma Z(0) vertices: 0.070GeV(-2) < a(0)/Lambda(2) < 0.070 GeV-2, 0.13GeV(-2) < a(c)/Lambda(2) < 0.19 GeV-2, 0.61GeV(-2) < a(n)/Lambda(2) < 0.57 GeV-2, where Lambda represents the energy scale for new physics. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: MONTE-CARLO PROGRAM ; W-PAIR PRODUCTION ; E(+)E(-) COLLISIONS ; E+E ANNIHILATION ; EVENT GENERATOR ; BOSON ; LEP ; DETECTOR ; PHYSICS ; COLLIDERS
Subjects: UNSPECIFIED
Departments: Faculty of Science and Technology > Physics
ID Code: 52309
Deposited By: ep_importer_pure
Deposited On: 12 Jan 2012 14:32
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:01
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/52309

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