Acciarri, M. ; Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (2000) Measurement of the e +e -→Zγγ cross section and determination of quartic gauge boson couplings at LEP Physics Letters B, 478 (1-3). pp. 39-49. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0370-2693(00)00279-3
Abstract
A first measurement of the cross section of the process e+e-→Zγγ is reported using a total integrated luminosity of 231 pb-1collected with the L3 detector at centre-of-mass energies of 182.7 GeV and 188.7 GeV. By selecting hadronic events with two isolated photons the e+e-→Zγγ cross section is measured to be 0.49+0.20-0.17 ±0.04 pb at 182.7 GeV and 0.47±0.10±0.04 pb at 188.7 GeV. The measurements are consistent with Standard Model expectations. Limits on Quartic Gauge Boson Couplings a0/Λ2 and ac/Λ2 of -0.009 GeV-2< a0 Λ2 <0.008 GeV -2and -0.007 GeV -2 7lt; ac>/Λ2 <0.013 GeV -2are derived at 95% confidence level.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 84060 |
| Deposited On: | 24 Feb 2012 05:34 |
| Last Modified: | 24 Feb 2012 05:34 |
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