Probing new physics scenarios using high energy events at NOvA far detector

Abstract

NuMI Off-axis ${\nu }_e$ Appearance (NOvA) experiment is an ongoing long baseline neutrino oscillation experiment. The primary channels of interest are the ${\nu }_e$, ${\bar{\nu }}_e$ appearance, ${\nu }_{\mu }$, ${\bar{\nu }}_{\mu }$ disappearance channels analyzed in the energy window $1<E_{\nu }<4$ GeV. However, NOvA far detector sees non-trivial high energy ${\nu }_e$, ${\bar{\nu }}_e$ events in the energy range $4<E_{\nu }<20$ 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 non-standard interaction (NSI) parameters and environmental decoherence. We observe that by including high energy events (signal + background) the degeneracy around ${\epsilon }_{e\tau }\sim 1.6$ can be removed throughout the ${\delta }_{CP}$ and ${\delta }_{e\tau }$ range. Further, we examine the role of signal versus beam background events in removing this degeneracy. In addition, we constrain the decoherence parameter $\Gamma$ considering events from $1<E_{\nu }<20$ GeV. Later, assuming the presence of decoherence in nature we obtain the allowed regions in ${\theta }_{23}$ and ${\delta }_{CP}$ plane.

30 pages, 10 figures

References in corpus (40)

• Simulation of long-baseline neutrino oscillation experiments with GLoBES
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Status of non-standard neutrino interactions
• Getting the most from the statistical analysis of solar neutrino oscillations
• Superbeams versus Neutrino Factories
• First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
• General bounds on non-standard neutrino interactions
• Non standard neutrino interactions
• Non-standard neutrino interactions in reactor and superbeam experiments
• Efficient numerical diagonalization of hermitian 3x3 matrices
• An Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment
• New constraints on oscillation parameters from ${\nu }_e$ appearance and ${\nu }_{\mu }$ disappearance in the NOvA experiment
• Quantum-Gravitational Diffusion and Stochastic Fluctuations in the Velocity of Light
• Neutrino Non-Standard Interactions: A Status Report
• Coherence of neutrino oscillations in the wave packet approach
• Open system approach to neutrino oscillations
• Improved constraints on neutrino mixing from the T2K experiment with $3.13\times 10^{21}$ protons on target
• CP-Violating Neutrino Non-Standard Interactions in Long-Baseline-Accelerator Data
• Non-standard neutrino interactions as a solution to the NO$\nu$A and T2K discrepancy
• Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence
• Damping signatures in future neutrino oscillation experiments
• Decoherence in neutrino propagation through matter, and bounds from IceCube/DeepCore
• Parameter Limits for Neutrino Oscillation with Decoherence in KamLAND
• Quantum Decoherence Effects in Neutrino Oscillations at DUNE
• Nonmaximal ${\theta }_{23}$ mixing at NOvA from neutrino decoherence
• Neutrino production coherence and oscillation experiments
• Neutrino decoherence from quantum gravitational stochastic perturbations
• Quantum Decoherence in a D-Foam Background
• How to Identify Different New Neutrino Oscillation Physics Scenarios at DUNE
• Combined analysis of neutrino decoherence at reactor experiments
• Revisiting quantum decoherence for neutrino oscillations in constant matter density
• Decoherence, matter effect, neutrino hierarchy signature in long baseline experiments
• Neutrino oscillation bounds on quantum decoherence
• Wave-packet treatment of neutrino oscillations and its implications on determining the neutrino mass hierarchy
• Possible Effects of Quantum Mechanics Violation Induced by Certain Quantum Gravity on Neutrino Oscillations
• Compact Perturbative Expressions for Neutrino Oscillations in Matter: II
• Flavor changing neutrino interactions and CP violation in neutrino oscillations
• Study of quantum decoherence at Protvino to ORCA experiment
• Search for $CP$-Violating Neutrino Nonstandard Interactions with the NOvA Experiment
• The effect of non-standard interactions and environmental decoherence at DUNE