Constraints on Anomalous Quaric Gauge Boson Couplings from vv gamma gamma and qq gamma gamma events at LEP 2
| dc.creator | The OPAL collaboration | |
| dc.creator | Abbiendi, G. | |
| dc.date | 2004-02-12 | |
| dc.date.accessioned | 2026-07-07T11:43:12Z | |
| dc.date.available | 2026-07-07T11:43:12Z | |
| dc.description | Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at centre-of-mass energies up to 209 GeV. Event selections identify vv gamma gamma and qq gamma gamma events in which the two photons are reconstructed within the detector acceptance. The cross-section for the process e+e- -> qq gamma gamma is measured. Averaging over all energies, the ratio of the observed e+e- -> qq gamma gamma 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 vv gamma gamma and qq gamma gamma data are used to constrain possible anomalous W+W- gamma gamma and ZZ gamma gamma couplings. Combining with previous OPAL results from the W+W- gamma final state, the 95% confidence level limits on the anomalous coupling parameters aoz, acz, aow and acw are found to be: -0.007 GeV^-2 < aoz/Lambda^2 < 0.023 GeV^-2 -0.029 GeV^-2 < acz/Lambda^2 < 0.029 GeV^-2 -0.020 GeV^-2 < aow/Lambda^2 < 0.020 GeV^-2 -0.052 GeV^-2 < acw/Lambda^2 < 0.037 GeV^-2 where Lamdba is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented. | |
| dc.description | 22 pages, 8 figures, Submitted to Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0402021 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0402021 | |
| dc.identifier | Phys.Rev.D70:032005,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.70.032005 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/201152 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Constraints on Anomalous Quaric Gauge Boson Couplings from vv gamma gamma and qq gamma gamma events at LEP 2 | |
| dc.type | text |