Ghost condensation and CPT violation in neutrino sector

TL;DR

This paper proposes a model where ghost condensation causes CPT violation in the neutrino sector, potentially explaining anomalies and predicting observable effects in cosmic microwave background radiation.

Contribution

It introduces a novel extra-dimensional model linking ghost condensation to CPT violation in neutrinos, addressing experimental anomalies and suggesting testable predictions.

Findings

Resolves the MINOS anomaly without conflicting with existing constraints

Predicts observable twinkling in the cosmic microwave background

Provides a testable framework for CPT violation in neutrino physics

Abstract

We consider CPT violation in neutrino sector, which is induced by ghost condensation. A model with extra dimension is suggested where ghost condensation occurs at a distant location separated from the SM brane. Right handed neutrinos in the bulk, which are originally introduced to explain small Yukawa couplings, play the role of messenger fields communicating ghost condensation and the standard model sector and lead to a sizable CPT violation in neutrino sector at the leading order. The model provides a resolution to the recent MINOS anomaly without spoiling any experimental constraints and may be able to be tested by observing an interesting phenomenon, twinkling cosmic microwave background radiation, with timescale about O(10-100) minutes at future CMB observations e.g. Planck.