HAL : in2p3-00192812, version 1
 arXiv : hep-ph/0107308
 Physical Review D 65 (2002) 035005
 Signal of heavy Majorana neutrinos at hadron colliders
 (2002)
 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.
 Thème(s) : Physique/Physique des Hautes Energies - Phénoménologie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ph/0107308
 in2p3-00192812, version 1 http://hal.in2p3.fr/in2p3-00192812 oai:hal.in2p3.fr:in2p3-00192812 Contributeur : Dominique Girod <> Soumis le : Jeudi 29 Novembre 2007, 14:31:45 Dernière modification le : Jeudi 29 Novembre 2007, 14:42:14