Probing CPT violation in neutrino oscillation: A three flavor analysis

Abstract

We have studied $CPT$ violation in neutrino oscillation considering three flavor framework with matter effect. We have constructed a new way to find the oscillation probability incorporating $CPT$ violating terms without any approximation. Then $CPT$ violation with atmospheric neutrinos for a magnetized iron calorimeter detector considering the muons (directly measurable with high resolution) of the charge current events has been studied for zero and nonzero ${\theta }_{13}$ values. It is found that a potential bound of $δb_{32} \lapp 6\times 10^{-24}$ GeV at 99% CL can be obtained with 1 Mton.year exposure of this detector; and unlike neutrino beam experiments, there is no possibility to generate `fake' $CPT$ violation due to matter effect with atmospheric neutrinos. The advantages of atmospheric neutrinos to discriminate $CPT$ violation from CP violation and nonstandard interactions are also discussed.

8 pages, 1 figure; discussions and references added, accepted in Phys. Lett. B

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Cited by in corpus (6)

• Neutrinos with Lorentz-violating operators of arbitrary dimension
• Probing Lorentz and CPT Violation in a Magnetized Iron Detector using Atmospheric Neutrinos
• Extrinsic and Intrinsic CPT Asymmetries in Neutrino Oscillations
• Long-range forces : atmospheric neutrino oscillation at a magnetized detector
• Mutual consistency of the MINOS and MiniBooNE Antineutrino Results and Possible CPT Violation
• Checking T and CPT violation with sterile neutrino