Year: 2025
Type: article
Abstract: NuMI Off-axis ν e Appearance (NOvA) experiment is an ongoing long-baseline neutrino oscillation experiment. The primary channels of interest are the ν e , ν ¯ e appearance, ν μ , ν ¯ μ disappearance channels analyzed in the energy window 1 < E ν < 4 GeV . However, NOvA far detector sees nontrivial high-energy ν e , ν ¯ e events in the energy range 4 < E ν < 20 GeV . These high-energy events provide us with an opportunity to investigate the subleading new physics scenarios. In this context, we study the sensitivity of the NOvA experiment to constrain the nonstandard interaction (NSI) parameters and environmental decoherence parameters. We observe that by including high energy events ( signal + background ) the degeneracy around ε e τ ∼ 1.6 can be removed throughout the δ C P and δ e τ range. Further, we examine the role of signal versus beam background events in removing this degeneracy. In addition, we constrain the decoherence parameter Γ considering events from 1 < E ν < 20 GeV . Later, assuming the presence of decoherence in nature we obtain the allowed regions in θ 23 and δ C P plane.
DOI: 10.1103/qg2k-md3c
Authors: Chinmay Bera, K. N. Deepthi
Institution: Mahindra University
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4416890359