Journal article
Search for anomalous production of high mass photon pairs in e+e− collisions at LEP
Abstract
A search for events with photon pairs of large invariant mass is described based on a data sample of 43 pb−1 collected with the OPAL detector. This search is motivated by the L3 observation of four events of the type e+e− → l+l−γγ with an invariant mass of the two photons, mγγ, clustering around 60 GeV. In the OPAL data, four ℓ+ℓ−γγ events are found with mγγ above 40 GeV. The number of observed events is consistent with the QED expectation and …
Authors
Acton PD; Akers R; Alexander G; Allison J; Anderson KJ; Arcelli S; Astbury A; Axen D; Azuelos G; Baines JTM
Journal
Physics Letters B, Vol. 311, No. 1-4, pp. 391–407
Publisher
Elsevier
Publication Date
July 1993
DOI
10.1016/0370-2693(93)90586-7
ISSN
0370-2693