Signals for Majorana neutrinos in a gamma-gamma collider

J. PERESSUTTI AND O. A. SAMPAYO

PHYSICAL REVIEW D - PARTICLE AND FILDS

APS

Año: 2002 vol. 67 p. 1 - 4

0556-2821

We study the possibilities to detect Majorana neutrinos in gamma-gamma colliders for different center of mass energies. We study the W+-W+-lj-+lk-+ (l j=electron,muon,tau ) final states which are, due to leptonic number violation, a clear signature for an intermediate Majorana neutrino contribution. Such a signal  (final dileptons of the same sign) is not possible if the heavy neutrinos are Dirac particles. We present our results for the total cross section as a function of the neutrino mass and center of mass energies.