Signals of eV-scale sterile neutrino at long baseline neutrino experiments

Abstract

While most of the results of the neutrino oscillation experiments can be accommodated within the standard paradigm of three active flavor, there are tantalizing hints of an light eV-scale sterile neutrino from anomalous results of a few short baseline experiments. This additional light sterile neutrino is expected to leave an imprint on the physics observables pertaining to standard unknowns such as determination of the Dirac-type leptonic $CP$ phase, ${\delta }_{13}$, the question of neutrino mass hierarchy and the octant of ${\theta }_{23}$. The upcoming long baseline neutrino experiments such as T2HK, DUNE and P2O will be sensitive to active - sterile mixing. In the present work, we examine and assess the capability of these long baseline experiments to probe the sterile neutrino at the level of probabilities and event rates. We perform a detailed study by taking into account the values of parameters that are presently allowed and (a) study the impact on $CP$ violation by examining the role played by various appearance and disappearance channels, (b) address the question of disentangling the intrinsic effects from extrinsic effects in the standard paradigm as well as three active plus one light sterile neutrino, and finally (c) assess the ability of these long baseline experiments to distinguish between the two scenarios. Our results indicate that for the true values of sterile parameters and for all values of ${\delta }_{13}$, the sensitivity of P2O is the lowest while the sensitivity of T2HK is modest ($<3\sigma$) and the sensitivity of DUNE is $>3\sigma$. For larger values of the sterile mixing angles, there is an improvement in the sensitivity for all the three considered experiments.

v2: to appear in EPJC

References in corpus (26)

• The Reactor Antineutrino Anomaly
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• 2020 Global reassessment of the neutrino oscillation picture
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• CP Violation and Neutrino Oscillations
• Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies
• Sterile Neutrinos
• Results from the Baksan Experiment on Sterile Transitions (BEST)
• Prospects for Beyond the Standard Model Physics Searches at the Deep Underground Neutrino Experiment
• Experiment Neutrino-4 search for sterile neutrino and results of measurements
• Addendum to: Global constraints on absolute neutrino masses and their ordering
• Mass Hierarchy Determination via future Atmospheric Neutrino Detectors
• Imprints of CP violation induced by sterile neutrinos in T2K data
• MicroBooNE and the ${\nu }_e$ Interpretation of the MiniBooNE Low-Energy Excess
• First constraints on light sterile neutrino oscillations from combined appearance and disappearance searches with the MicroBooNE detector
• Capabilities of long-baseline experiments in the presence of a sterile neutrino
• Neutrino oscillation probabilities through the looking glass
• Sterile Neutrino Searches with MicroBooNE: Electron Neutrino Disappearance
• The Impact of Different Parameterizations on the Interpretation of CP Violation in Neutrino Oscillations
• MiniBooNE and MicroBooNE Combined Fit to a 3+1 Sterile Neutrino Scenario
• Study of light sterile neutrino at the long-baseline experiment options at KM3NeT
• Scintillation Light in SBND: Simulation, Reconstruction, and Expected Performance of the Photon Detection System
• Sterile Neutrinos: Propagation in Matter and Sensitivity to Sterile Mass Ordering
• Exploring the new physics phases in 3+1 scenario in neutrino oscillation experiments

Cited by in corpus (1)

• Majorana CP Violation Insights from Decaying Neutrinos