Discerning the Nature of Neutrinos: Decoherence and Geometric Phases

Universe

Gaetano Lambiase¹  Aniello Quaranta¹  Antonio Capolupo¹  SalvatoreMarco Giampaolo² 

[1] Dipartimento di Fisica “E.R. Caianiello” Universitá di Salerno, and INFN—Gruppo Collegato di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;Division of Theoretical Physics, Ruder Bošković Institute, Bijenčka Cesta 54, 10000 Zagreb, Croatia;

关键词: geometric phase;    neutrino oscillation;    decoherence;    neutrino nature;   

DOI  :  10.3390/universe6110207

来源: DOAJ

【 摘 要 】

We present new approaches to distinguish between Dirac and Majorana neutrinos. The first is based on the analysis of the geometric phases associated to neutrinos in matter, the second on the effects of decoherence on neutrino oscillations. In the former we compute the total and geometric phase for neutrinos, and find that they depend on the Majorana phase and on the parametrization of the mixing matrix. In the latter, we show that Majorana neutrinos might violate $CPT$ symmetry, whereas Dirac neutrinos preserve $CPT$. A phenomenological analysis is also reported showing the possibility to highlight the distinctions between Dirac and Majorana neutrinos.

【 授权许可】

Unknown