CPT and lepton number violation in neutrino sector: Modified mass matrix and oscillation due to gravity

Understand

We study the consequences of CPT and lepton number violation in neutrino sector.

• For CPT violation we take gravity with which neutrino and antineutrino couple differently.
• Gravity mixes neutrino and antineutrino in an unequal ratio to give two mass eigenstates.
• Lepton number violation interaction together with CPT violation gives rise to neutrino-antineutrino oscillation.