• Open Access

Manifestations of nonzero Majorana CP-violating phases in oscillations of supernova neutrinos

Artem Popov and Alexander Studenikin
Phys. Rev. D 103, 115027 – Published 22 June 2021

Abstract

We investigate effects of nonzero Dirac and Majorana CP-violating phases on neutrino-antineutrino 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 in the oscillations channels νeν¯e, νeν¯μ, and νeν¯τ. We also consider all other possible oscillation channels with νμ and ντ in the initial state. The resonances can potentially lead to significant phenomena in neutrino oscillations accessible for observation in experiments. In particular, we show that neutrino-antineutrino oscillations combined with Majorana-type CP violation can affect the ν¯e/νe ratio for neutrinos coming from the supernovae explosion. This effect is more prominent for the normal neutrino mass ordering. 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.

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  • Received 14 February 2021
  • Accepted 18 May 2021

DOI:https://doi.org/10.1103/PhysRevD.103.115027

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Artem Popov*

  • Department of Theoretical Physics, Moscow State University, Moscow 119991, Russia

Alexander Studenikin

  • Department of Theoretical Physics, Moscow State University, Moscow 119991, Russia and Joint Institute for Nuclear Research, Dubna 141980, Russia

  • *ar.popov@physics.msu.ru
  • studenik@srd.sinp.msu.ru

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Issue

Vol. 103, Iss. 11 — 1 June 2021

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