Detecting CP Violation in the Presence of Non-Standard Neutrino Interactions

Abstract

New physics beyond the Standard Model could appear at long baseline oscillation experiments as non-standard interactions (NSI) between neutrinos and matter. If so, determination of the CP-violating phase ${\delta }_{13}$ is ambiguous due to interference with additional complex phases. I'll present my work using both numerical solutions and a perturbative approach to study oscillation probabilities in the presence of NSI. I'll show how the CP phase degeneracies are visualized on biprobability plots, and the extent to which the energy spectrum for a given baseline length can help resolve them. In particular, this shows how the broad range of energies at DUNE would help distinguish between maximal, standard CP violation and the absence of CP violation with large ${\epsilon }_{e\tau }$.

arXiv commentTalk presented at CIPANP2018, based on arXiv:1806.09221

References in corpus (23)

• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• Non standard neutrino interactions
• Leptonic CP violation
• New constraints on oscillation parameters from ${\nu }_e$ appearance and ${\nu }_{\mu }$ disappearance in the NOvA experiment
• Non-standard Neutrino Interactions at DUNE
• Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu }_e$ interactions at the far detector
• Degeneracies in long-baseline neutrino experiments from nonstandard interactions
• Degeneracy between ${\theta }_{23}$ octant and neutrino non-standard interactions at DUNE
• Non-standard interactions spoiling the CP violation sensitivity at DUNE and other long baseline experiments
• Large-Theta(13) Perturbation Theory of Neutrino Oscillation for Long-Baseline Experiments
• Hints for leptonic CP violation or New Physics?
• Non-standard interactions and the CP phase measurements in neutrino oscillations at low energies
• Sensitivity of the T2HKK experiment to the non-standard interaction
• Can nonstandard interactions jeopardize the hierarchy sensitivity of DUNE ?
• Non-Standard Interactions at a Neutrino Factory: Correlations and CP violation
• Resolving CP Violation by Standard and Nonstandard Interactions and Parameter Degeneracy in Neutrino Oscillations
• Challenges posed by non-standard neutrino interactions in the determination of ${\delta }_{CP}$ at DUNE
• Neutrino vs. Antineutrino Oscillation Parameters at DUNE and Hyper-Kamiokande
• The Discovery reach of $CP$ violation in neutrino oscillation with non-standard interaction effects
• False Signals of CP-Invariance Violation at DUNE
• Searching for Novel Neutrino Interactions at NOvA and Beyond in Light of Large theta_13
• Implications of lepton flavour violation on long baseline neutrino oscillation experiments
• Biprobability approach to CP phase degeneracy from non-standard neutrino interactions