DOI 10.1007/s100529800899
Flavour transitions of Dirac-Majorana neutrinos
Salvatore Esposito1 - Nicola Tancredi1
1 Dipartimento di Scienze Fisiche, Università di Napoli "Federico II'' Mostra d'Oltremare Pad. 19, I-80125 Napoli, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Mostra d'Oltremare Pad. 20, I-80125 Napoli, Italy
Received: 20 February 1998 / Published online: 5 June 1998
Abstract
From a phenomenological point of view, we study active-active and
active-sterile flavour-changing (and flavour-conserving)
oscillations
of Dirac-Majorana neutrinos both in vacuum and in matter. The general
expressions for the transition probabilities in vacuum are reported.
We then investigate some interesting consequences following from
particular simple forms of the neutrino mass matrices, and for the
envisaged scenarios we discuss in detail neutrino propagation in
matter. Special emphasis is given to the problem of occurrence of resonant
enhancement of active-active and active-sterile neutrino oscillations
in a medium. The peculiar novel features related to the Dirac-Majorana
nature of neutrinos are particularly pointed out.
Copyright Springer-Verlag
