Adriani, O. ; Aguilar-Benitez, M. ; Ahlen, S. ; Gurtu, A. ; et., al (1992) A test of quantum electrodynamics in the reaction e+e- → γγ(γ) Physics Letters B, 288 (3-4). pp. 404-411. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0370-2693(92)91120-X
Abstract
We have measured the total and differential cross sections of the reaction e+e- → γγ(γ) at center-of-mass energies around 91 GeV, with an integrated luminosity of 14.2 pb-1. The results are in good agreement with QED predictions. We set lower limits, at 95% confidence level, on the QED cutoff parameters of Λ+ > 139 GeV, Λ− > 108 GeV and on the mass of an excited electron of me*>127 GeV. We searched for Z0 rare decays with photonic signitures in the final state. Upper limits, at 95% confidence level, for branching ratio of Z0 decaying into π0 γ/γγ, νγ and γγγ are 1.2 × 10-4 , 1.8 × 10-4 , 3.3 × 10-5 respectively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 83331 |
| Deposited On: | 20 Feb 2012 06:14 |
| Last Modified: | 20 Feb 2012 06:14 |
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