Effects of nonzero Majorana CP phases on oscillations of supernova neutrinos

1 Sep 2021, 18:00
1h 30m
Poster Neutrino physics and astrophysics Poster session 2


Artem Popov (Lomonosov Moscow State University)


We study the effects of nonzero Dirac and Majorana CP-violating phases in neutrino oscillations in a magnetic field of astrophysical environments. It is shown that in the presence of strong magnetic fields and dense matter, nonzero CP phases can induce new resonances, particularly in the oscillations channels $\nu_e \leftrightarrow \bar{\nu}_e$, $\nu_e \leftrightarrow \bar{\nu}_\mu$ and $\nu_e \leftrightarrow \bar{\nu}_{\tau}$. We show that neutrino-antineutrino oscillations can affect the $\bar{\nu}_e$/$\nu_e$ ratio for neutrinos coming from the supernovae explosion, provided that the Majorana CP-violation phases are nonzero. The detection of supernovae neutrino fluxes in the future experiments, such as JUNO, DUNE and Hyper-Kamiokande, can give an insight into the nature of CP violation and, consequently, provides a tool for distinguishing the Dirac or Majorana nature of neutrinos.

This research has been supported by the Interdisciplinary Scientific and Educational School of Moscow University “Fundamental and Applied Space Research” and also by the Russian Foundation for Basic Research under Grant No. 20-52-53022-GFEN-a. The work of A. P. has been supported by the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS” under Grant No. 19-2-6-209-1.

[1] A. Popov, A. Studenikin, “Manifestations of nonzero Majorana CP-violating phases in
oscillations of supernova neutrinos", Phys.Rev.D 103 (2021) 11, 115027

Reference to paper (DOI or arXiv) https://doi.org/10.1103/PhysRevD.103.115027

Primary author

Artem Popov (Lomonosov Moscow State University)


Alexander Studenikin (Moscow State University & JINR (Dubna))

Presentation Materials

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