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Title: Nonstandard neutrino interactions at DUNE, T2HK and T2HKK

Here, we study the matter effect caused by nonstandard neutrino interactions (NSI) in the next generation long-baseline neutrino experiments, DUNE, T2HK and T2HKK. If multiple NSI parameters are nonzero, the potential of these experiments to detect CP violation, determine the mass hierarchy and constrain NSI is severely impaired by degeneracies between the NSI parameters and by the generalized mass hierarchy degeneracy. In particular, a cancellation between leading order terms in the appearance channels when ϵ = cot θ 23ϵ , strongly affects the sensitivities to these two NSI parameters at T2HK and T2HKK. We also study the dependence of the sensitivities on the true CP phase and the true mass hierarchy, and find that overall DUNE has the best sensitivity to the magnitude of the NSI parameters, while T2HKK has the best sensitivity to CP violation whether or not there are NSI. Furthermore, for T2HKK a smaller off-axis angle for the Korean detector is better overall. We find that due to the structure of the leading order terms in the appearance channel probabilities, the NSI sensitivities in a given experiment are similar for both mass hierarchies, modulo the phase change δ→δ + 180°.
Authors:
 [1] ;  [1] ;  [2]
  1. Univ. of Hawaii-Manoa, Honolulu, HI (United States). Dept. of Physics and Astronomy
  2. Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
SC0010504
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Iowa State Univ., Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; CP violation; Neutrino Physics
OSTI Identifier:
1360779

Liao, Jiajun, Marfatia, Danny, and Whisnant, Kerry. Nonstandard neutrino interactions at DUNE, T2HK and T2HKK. United States: N. p., Web. doi:10.1007/JHEP01(2017)071.
Liao, Jiajun, Marfatia, Danny, & Whisnant, Kerry. Nonstandard neutrino interactions at DUNE, T2HK and T2HKK. United States. doi:10.1007/JHEP01(2017)071.
Liao, Jiajun, Marfatia, Danny, and Whisnant, Kerry. 2017. "Nonstandard neutrino interactions at DUNE, T2HK and T2HKK". United States. doi:10.1007/JHEP01(2017)071. https://www.osti.gov/servlets/purl/1360779.
@article{osti_1360779,
title = {Nonstandard neutrino interactions at DUNE, T2HK and T2HKK},
author = {Liao, Jiajun and Marfatia, Danny and Whisnant, Kerry},
abstractNote = {Here, we study the matter effect caused by nonstandard neutrino interactions (NSI) in the next generation long-baseline neutrino experiments, DUNE, T2HK and T2HKK. If multiple NSI parameters are nonzero, the potential of these experiments to detect CP violation, determine the mass hierarchy and constrain NSI is severely impaired by degeneracies between the NSI parameters and by the generalized mass hierarchy degeneracy. In particular, a cancellation between leading order terms in the appearance channels when ϵeτ= cot θ 23ϵeμ, strongly affects the sensitivities to these two NSI parameters at T2HK and T2HKK. We also study the dependence of the sensitivities on the true CP phase and the true mass hierarchy, and find that overall DUNE has the best sensitivity to the magnitude of the NSI parameters, while T2HKK has the best sensitivity to CP violation whether or not there are NSI. Furthermore, for T2HKK a smaller off-axis angle for the Korean detector is better overall. We find that due to the structure of the leading order terms in the appearance channel probabilities, the NSI sensitivities in a given experiment are similar for both mass hierarchies, modulo the phase change δ→δ + 180°.},
doi = {10.1007/JHEP01(2017)071},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2017,
place = {United States},
year = {2017},
month = {1}
}