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Title: C P -Violating Neutrino Nonstandard Interactions in Long-Baseline-Accelerator Data

Journal Article · · Physical Review Letters

Neutrino oscillations in matter provide a unique probe of new physics. Leveraging the advent of neutrino appearance data from NOvA and T2K in recent years, we investigate the presence of CP-violating neutrino non-standard interactions in the oscillation data. We first show how to very simply approximate the expected NSI parameters to resolve differences between two long-baseline appearance experiments analytically. Then, by combining recent NOvA and T2K data, we find a tantalizing hint of CP-violating NSI preferring a new complex phase that is close to maximal: φ or φ ≈ 3π/2 with |ϵ| or |ϵ| ~ 0.2. We then compare the results from long-baseline data to constraints from IceCube and COHERENT.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704; SC0014664
OSTI ID:
1783392
Alternate ID(s):
OSTI ID: 1785105
Report Number(s):
BNL-221544-2021-JAAM; PRLTAO; 051801
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 126 Journal Issue: 5; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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