Signal of heavy Majorana neutrinos at hadron colliders

Details Signal of heavy Majorana neutrinos at hadron colliders Signal of heavy Majorana neutrinos at hadron colliders

2001-07-30

arxiv.org/abs/hep-ph/0107308v1

Phys.Rev. D65 (2002) 035005

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 7 figures, Revtex3

Scientific paper

10.1103/PhysRevD.65.035005

The lepton number violating signal of like-sign-dileptons (LSD), p p \to \ell^\pm\ell^\pm + 2 jets, is investigated within a model of mixing in the neutrino sector assuming the existence of heavy Majorana neutrino states with a left--handed coupling to the light leptons. The LSD signal receives contributions both from the resonant production of a heavy Majorana neutrino (N) and from the exchange of a virtual N in the WW fusion mechanisms. These two possibilities are discussed in detail and compared. Helicity amplitudes are given pointing out differences with calculations previously reported by other authors. The signal cross--sections are computed at the energy of the LHC collider (sqrt{S}=14 TeV) at CERN and within the existing experimental limits on the mixing couplings, including those coming from neutrinoless double beta decay. Detailed angular distributions of signal reactions which are complementary to previous studies on the argument are presented.

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