Abstract
Recently, the L3 Collaboration has reported the observation of four events in the reactions →ll¯+γγ, l=e,μ,τ, with the invariant photon pair mass near 60 GeV in a data sample collected in the L3 detector corresponding to 950 000 produced ’s. More recently, more data from the other LEP Collaborations have become available. In this paper we use the Monte Carlo generator yfs3 and our recent exact results on →ll¯+γγ to assess the QED expectations for such L3-type high mass photon pair events in →ll¯+γγ+n(γ) near the resonance.
- Received 18 February 1994
DOI:https://doi.org/10.1103/PhysRevD.51.3149
©1995 American Physical Society