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Exploring the new physics phases in 3+1 scenario in neutrino oscillation experiments

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Title
Exploring the new physics phases in 3+1 scenario in neutrino oscillation experiments
Author(s)
Nishat Fiza; Mehedi Masud; Manimala Mitra
Publication Date
2021-09-01
Journal
Journal of High Energy Physics, v.2021, no.9, pp.1 - 27
Publisher
Springer Science and Business Media Deutschland GmbH
Abstract
© 2021, The Author(s).The various global analyses of available neutrino oscillation data indicate the presence of the standard 3 + 0 neutrino oscillation picture. However, there are a few short baseline anomalies that point to the possible existence of a fourth neutrino (with mass in the eV-scale), essentially sterile in nature. Should sterile neutrino exist in nature and its presence is not taken into consideration properly in the analyses of neutrino data, the interference terms arising due to the additional CP phases in presence of a sterile neutrino can severely impact the physics searches in long baseline (LBL) neutrino oscillation experiments. In the current work we consider one light (eV-scale) sterile neutrino and probe all the three CP phases (δ13, δ24, δ34) in the context of the upcoming Deep Underground Neutrino Experiment (DUNE) and also estimate how the results improve when data from NOvA, T2K and T2HK are added in the analysis. We illustrate the ∆χ2 correlations of the CP phases among each other, and also with the three active-sterile mixing angles. Finally, we briefly illustrate how the relevant parameter spaces in the context of neutrinoless double beta decay get modified in light of the bounds in presence of a light sterile neutrino.
URI
https://pr.ibs.re.kr/handle/8788114/10541
DOI
10.1007/JHEP09(2021)162
ISSN
1126-6708
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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