Manifestations of non-zero Majorana CP violating phases in oscillations of supernova neutrinos

Abstract

We investigate effects of non-zero 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, non-zero CP phases can induce new resonances in the oscillations channels ${\nu }_e\leftrightarrow {\bar{\nu }}_e$, ${\nu }_e\leftrightarrow {\bar{\nu }}_{\mu }$ and ${\nu }_e\leftrightarrow {\bar{\nu }}_{\tau }$. We also consider all other possible oscillation channels with ${\nu }_{\mu }$ and ${\nu }_{\tau }$ 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 ${\bar{\nu }}_e$/${\nu }_e$ 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.

arXiv comment14 pages in LaTex, 8 figures

References in corpus (20)

• Neutrino Physics with JUNO
• Leptogenesis
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• Nucleosynthesis in neutrino-driven winds: I. The physical conditions
• Monte Carlo Study of Supernova Neutrino Spectra Formation
• Electroweak Baryogenesis
• An improved upper limit on the neutrino mass from a direct kinematic method by KATRIN
• The Magnetorotational Instability in Core Collapse Supernova Explosions
• Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations
• First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
• Leptonic CP violation
• Limiting neutrino magnetic moments with Borexino Phase-II solar neutrino data
• Collective neutrinos oscillation in matter and CP-violation
• Supernova Bounds on Resonant Active-Sterile Neutrino Conversions
• Particle-physics constraints from the globular cluster M5: Neutrino Dipole Moments
• Possible CP-Violation effects in core-collapse Supernovae
• Extrinsic CPT Violation in Neutrino Oscillations in Matter
• Majorana CP-violating phases in neutrino-antineutrino oscillations and other lepton-number-violating processes
• No Effect of Majorana Phases in Neutrino Oscillations
• Neutrino eigenstates and flavour, spin and spin-flavour oscillations in a constant magnetic field

Cited by in corpus (3)

• Neutrino Electromagnetic Properties
• Geometric and Majorana phases in neutrino oscillations
• Exploring the nature of neutrinos in a dissipative environment