Four leptons final states from γγ fusion
نویسنده
چکیده
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.
منابع مشابه
Four-lepton production from photon-induced reactions in pp collisions at the LHC
The study of photon–photon (γγ) fusion processes in proton–proton (pp) collisions at the LHC provides a very important test of the electroweak theory [1–3]. The γγ interactions leading to four leptons (γγ → 4`, i.e. γγ → 2e+2e−, γγ → e+e−μ+μ− and γγ → 2μ+2μ−) can be another step towards these studies. The baseline cross section, σγγ→4`, has been first estimated in the lowenergy approximation [4...
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