Evidence for leptonic CP phase from NO$\nu$A, T2K and ICAL: A chronological progression

Abstract

We study the synergy between the long-baseline (LBL) experiments NO$\nu$A and T2K and the atmospheric neutrino experiment ICAL@INO for obtaining the first hint of CP violation in the lepton sector. We also discuss how precisely the leptonic CP phase (${\delta }_{CP}$) can be measured by these experiments. The CP sensitivity is first described at the level of oscillation probabilities, discussing its dependence on the parameters -- ${\theta }_{13}$, mass hierarchy and ${\theta }_{23}$. In particular, we discuss how the precise knowledge or lack thereof of these parameters can affect the CP sensitivity of LBL experiments. We follow a staged approach and analyze the ${\delta }_{CP}$ sensitivity that can be achieved at different points of time over the next 15 years from these LBL experiments alone and/or in conjunction with ICAL@INO. We find that the CP sensitivity of NO$\nu$A/T2K is enhanced due to the synergies between the different channels and between the two experiments. On the other hand the lack of knowledge of hierarchy and octant makes the CP sensitivity poorer for some parameter ranges. Addition of ICAL data to T2K and NO$\nu$A can exclude these spurious wrong-hierarchy and/or wrong-octant solutions and cause a significant increase in the range of ${\delta }_{CP}$ values for which a hint of CP violation can be achieved. In fact in parameter regions unfavourable for NO$\nu$A/T2K, we may get the first evidence of CP violation by adding the ICAL data to these. Similarly the precision with which ${\delta }_{CP}$ can be measured also improves with inclusion of ICAL data.

38 pages, 21 figures, version accepted in Nuclear Physics B

References in corpus (5)

• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Global status of neutrino oscillation parameters after Neutrino-2012
• Mass Hierarchy Determination via future Atmospheric Neutrino Detectors
• Neutrino mass hierarchy and octant determination with atmospheric neutrinos
• What is the probability that ${\theta }_{13}$ and CP violation will be discovered in future neutrino oscillation experiments?

Cited by in corpus (22)

• Physics Potential of the ICAL detector at the India-based Neutrino Observatory (INO)
• Non-Standard Interactions in propagation at the Deep Underground Neutrino Experiment
• Potential of the J-PET detector for studies of discrete symmetries in decays of positronium atom - a purely leptonic system
• New look at the degeneracies in the neutrino oscillation parameters, and their resolution by T2K, NO$\nu$A and ICAL
• Interplay between Appearance and Disappearance Channels for Precision Measurements of ${\theta }_{23}$ and $\delta$
• The physics of antineutrinos in DUNE and determination of octant and ${\delta }_{CP}$
• Complementarity Between Hyperkamiokande and DUNE in Determining Neutrino Oscillation Parameters
• Effect of systematics in the T2HK, T2HKK, and DUNE experiments
• Probing Neutrino Oscillation Parameters using High Power Superbeam from ESS
• Probing CP violation with T2K, NO$\nu$A and DUNE in the presence of non-unitarity
• Imprints of scalar NSI on the CP-violation sensitivity using synergy among DUNE, T2HK and T2HKK
• Enhancing the hierarchy and octant sensitivity of ESS$\nu$SB in conjunction with T2K, NO$\nu$A and ICAL@INO
• Reason for T2K to run in dominant neutrino mode for detecting CP violation
• Matter effects at the T2HK and T2HKK experiments
• A hybrid setup for fundamental unknowns in neutrino oscillations using T2HK ($\nu$) and $\mu$-DAR ($\bar{\nu }$)
• Exploring Flavor-Dependent Long-Range Forces in Long-Baseline Neutrino Oscillation Experiments
• Revisiting the sensitivity studies for leptonic CP violation and mass hierarchy with T2K, NOvA and LBNE experiments
• Octant Degeneracy, Quadrant of leptonic CPV phase at Long Baseline Neutrino Experiments and Baryogenesis
• Testable constraint on near-tribimaximal neutrino mixing
• CPT and CP, an entangled couple
• Indirect searches of Galactic diffuse dark matter in INO-MagICAL detector
• Atmospheric Neutrinos: Status and Prospects