Decay and decoupling of heavy right-handed Majorana neutrinos in the L-R model Paramita Adhya, D. Rai Chaudhuri and Amitava Raychaudhuri Eur. Phys. J. C, 19 1 (2001) 183-190 Published online: 15 February 2001 DOI: 10.1007/s100520100575