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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 0370-2693Full text not available from this repository.
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.
|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|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||12 Jan 2012 14:32|
|Last Modified:||15 Jul 2016 01:14|
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