Rights statement: © 2004 The American Physical Society
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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 ; Ainsley, C ; Akesson, P F et al.
In: Physical Review D, Vol. 70, No. 3, 032005, 08.2004, p. -.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - 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
AU - Abbiendi, G
AU - Ainsley, C
AU - Akesson, P F
AU - Alexander, G
AU - Allison, J
AU - Amaral, P
AU - Anagnostou, G
AU - Anderson, K J
AU - Asai, S
AU - Axen, D
AU - Azuelos, G
AU - Bailey, I
AU - Barberio, E
AU - Barillari, T
AU - Barlow, R J
AU - Batley, R J
AU - Bechtle, P
AU - Behnke, T
AU - Bell, K W
AU - Bell, P J
AU - Bella, G
AU - Bellerive, A
AU - Benelli, G
AU - Bethke, S
AU - Biebel, O
AU - Boeriu, O
AU - Bock, P
AU - Boutemeur, M
AU - Braibant, S
AU - Brigliadori, L
AU - Brown, R M
AU - Buesser, K
AU - Burckhart, H J
AU - Campana, S
AU - Carnegie, R K
AU - Carter, A A
AU - Carter, J R
AU - Chang, C Y
AU - Charlton, D G
AU - Ciocca, C
AU - Csilling, A
AU - Cuffiani, M
AU - Dado, S
AU - De Roeck, A
AU - De Wolf, E A
AU - Desch, K
AU - Dienes, B
AU - Donkers, M
AU - Dubbert, J
AU - Duchovni, E
AU - OPAL Collaboration
N1 - © 2004 The American Physical Society
PY - 2004/8
Y1 - 2004/8
N2 - 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
AB - 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
KW - W-PAIR PRODUCTION
KW - MONTE-CARLO
KW - E(+)E(-) COLLISIONS
KW - E+E ANNIHILATION
KW - CROSS-SECTIONS
KW - DETECTOR
KW - PROGRAM
KW - EXPONENTIATION
KW - ALGORITHM
KW - COLLIDERS
U2 - 10.1103/PhysRevD.70.032005
DO - 10.1103/PhysRevD.70.032005
M3 - Journal article
VL - 70
SP - -
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 3
M1 - 032005
ER -