Neutrino-antineutrino Mass Splitting in the Standard Model: Neutrino Oscillation and Baryogenesis

Abstract

By adding a neutrino mass term to the Standard Model, which is Lorentz and $SU(2)\times U(1)$ invariant but non-local to evade $CPT$ theorem, it is shown that non-locality within a distance scale of the Planck length, that may not be fatal to unitarity in generic effective theory, can generate the neutrino-antineutrino mass splitting of the order of observed neutrino mass differences, which is tested in oscillation experiments, and non-negligible baryon asymmetry depending on the estimate of sphaleron dynamics. The one-loop order induced electron-positron mass splitting in the Standard Model is shown to be finite and estimated at $\sim 10^{-20}$ eV, well below the experimental bound $<10^{-2}$ eV. The induced $CPT$ violation in the $K$-meson in the Standard Model is expected to be even smaller and well below the experimental bound $|m_K-m_{\bar{K}}|<0.44\times 10^{-18}$ GeV.

arXiv commentA brief review in MPLA, 10 pages

References in corpus (8)

• Neutrinos as the messengers of CPT violation
• CPT-odd Resonances in Neutrino Oscillations
• An improved measurement of muon antineutrino disappearance in MINOS
• CPT Violation Does Not Lead to Violation of Lorentz Invariance and Vice Versa
• Path Integral for Space-time Noncommutative Field Theory
• On the assertion that PCT violation implies Lorentz non-invariance
• On neutrino masses via CPT violating Higgs interaction in the Standard Model
• Neutrino-antineutrino mass splitting in the Standard Model and baryogenesis

Cited by in corpus (2)

• Parity-doublet representation of Majorana fermions and neutron oscillation
• Neutron-antineutron oscillation and parity and CP symmetries