Evolution of neutrino mass-mixing parameters in matter with non-standard interactions

Abstract We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of lepton-flavor-conserving and lepton-flavor-violating neutral-current non-standard interactions (NSI) of the neutrino. We derive simple approximate analytical expressions showing the e...

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Autores principales:	Sanjib Kumar Agarwalla, Sudipta Das, Mehedi Masud, Pragyanprasu Swain
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Beyond Standard Model Neutrino Physics Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/9b726dae024b4e0f92f7ce7b008655b9
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spelling	oai:doaj.org-article:9b726dae024b4e0f92f7ce7b008655b92021-11-21T12:41:41ZEvolution of neutrino mass-mixing parameters in matter with non-standard interactions10.1007/JHEP11(2021)0941029-8479https://doaj.org/article/9b726dae024b4e0f92f7ce7b008655b92021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)094https://doaj.org/toc/1029-8479Abstract We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of lepton-flavor-conserving and lepton-flavor-violating neutral-current non-standard interactions (NSI) of the neutrino. We derive simple approximate analytical expressions showing the evolution of mass-mixing parameters in matter with energy in the presence of standard interactions (SI) and SI+NSI (considering both positive and negative values of real NSI parameters). We observe that only the NSI parameters in the (2,3) block, namely ε μτ and (γ − β) ≡ (ε ττ − ε μμ ) affect the modification of θ 23. Though all the NSI parameters influence the evolution of θ 13, ε eμ and ε eτ show a stronger impact at the energies relevant for DUNE. The solar mixing angle θ 12 quickly approaches to ∼ 90 ° with increasing energy in both SI and SI+NSI cases. The change in ∆ m 21 , m 2 $$ {m}_{21,m}^2 $$ is quite significant as compared to ∆ m 31 , m 2 $$ {m}_{31,m}^2 $$ both in SI and SI+NSI frameworks for the energies relevant for DUNE baseline. Flipping the signs of the NSI parameters alters the way in which mass-mixing parameters run with energy. We demonstrate the utility of our approach in addressing several important features related to neutrino oscillation such as: a) unraveling interesting degeneracies between θ 23 and NSI parameters, b) estimating the resonance energy in presence of NSI when θ 13 in matter becomes maximal, c) figuring out the required baselines and energies to have maximal matter effect in ν μ → ν e transition in the presence of different NSI parameters, and d) studying the impact of NSI parameters ε μτ and (γ − β) on the ν μ → ν μ survival probability.Sanjib Kumar AgarwallaSudipta DasMehedi MasudPragyanprasu SwainSpringerOpenarticleBeyond Standard ModelNeutrino PhysicsNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-47 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beyond Standard Model Neutrino Physics Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Beyond Standard Model Neutrino Physics Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Sanjib Kumar Agarwalla Sudipta Das Mehedi Masud Pragyanprasu Swain Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
description	Abstract We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of lepton-flavor-conserving and lepton-flavor-violating neutral-current non-standard interactions (NSI) of the neutrino. We derive simple approximate analytical expressions showing the evolution of mass-mixing parameters in matter with energy in the presence of standard interactions (SI) and SI+NSI (considering both positive and negative values of real NSI parameters). We observe that only the NSI parameters in the (2,3) block, namely ε μτ and (γ − β) ≡ (ε ττ − ε μμ ) affect the modification of θ 23. Though all the NSI parameters influence the evolution of θ 13, ε eμ and ε eτ show a stronger impact at the energies relevant for DUNE. The solar mixing angle θ 12 quickly approaches to ∼ 90 ° with increasing energy in both SI and SI+NSI cases. The change in ∆ m 21 , m 2 $$ {m}_{21,m}^2 $$ is quite significant as compared to ∆ m 31 , m 2 $$ {m}_{31,m}^2 $$ both in SI and SI+NSI frameworks for the energies relevant for DUNE baseline. Flipping the signs of the NSI parameters alters the way in which mass-mixing parameters run with energy. We demonstrate the utility of our approach in addressing several important features related to neutrino oscillation such as: a) unraveling interesting degeneracies between θ 23 and NSI parameters, b) estimating the resonance energy in presence of NSI when θ 13 in matter becomes maximal, c) figuring out the required baselines and energies to have maximal matter effect in ν μ → ν e transition in the presence of different NSI parameters, and d) studying the impact of NSI parameters ε μτ and (γ − β) on the ν μ → ν μ survival probability.
format	article
author	Sanjib Kumar Agarwalla Sudipta Das Mehedi Masud Pragyanprasu Swain
author_facet	Sanjib Kumar Agarwalla Sudipta Das Mehedi Masud Pragyanprasu Swain
author_sort	Sanjib Kumar Agarwalla
title	Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
title_short	Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
title_full	Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
title_fullStr	Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
title_full_unstemmed	Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
title_sort	evolution of neutrino mass-mixing parameters in matter with non-standard interactions
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/9b726dae024b4e0f92f7ce7b008655b9
work_keys_str_mv	AT sanjibkumaragarwalla evolutionofneutrinomassmixingparametersinmatterwithnonstandardinteractions AT sudiptadas evolutionofneutrinomassmixingparametersinmatterwithnonstandardinteractions AT mehedimasud evolutionofneutrinomassmixingparametersinmatterwithnonstandardinteractions AT pragyanprasuswain evolutionofneutrinomassmixingparametersinmatterwithnonstandardinteractions
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Evolution of neutrino mass-mixing parameters in matter with non-standard interactions

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