Four leptons final states from γγ fusion

الأصل · EN

I present a systematic study of all possible four leptons final states from γγ collisions. It is given a detailed account of fermion masses effects which are sizable since several collinear and t channel enancements occur. The effects of angular cuts on the final charged leptons are also discussed. To perform the computation I have used the recently developed ALPHA algorithm (and the resulting code) for the automatic computation of scattering amplitudes.