Majorana phases in neutrino-antineutrino oscillations

Abstract. If the massive neutrinos are Majorana particles, neutrinoless double beta (0νββ) decay experiments are not enough to determine the Majorana phases. We carry out a systematic study of CP violation in neutrino-antineutrino oscillations. In these processes, CP-conserving parts involve six independent 0νββ-like mass terms 〈m〉αβ and CP-violating parts are associated with nine independent Jarlskog-like parameters Vijαβ (for α, β = e, µ, τ and i, j = 1, 2, 3). With the help of current neutrino oscillation data, we illustrate the salient features of six independent CP-violating asymmetries between να → νβ and να → νβ oscillations. 1