Physics potential of the ESS$\nu$SB

Abstract

The ESS$\nu$SB project proposes to base a neutrino ''Super Beam'' of unprecedented luminosity at the European Spallation Source. The original proposal identified the second peak of the oscillation probability as the optimal to maximize the discovery potential to leptonic CP violation. However this choice reduces the statistics at the detector and penalizes other complementary searches such as the determination of the atmospheric oscillation parameters, particularly the octant of ${\theta }_{23}$ as well as the neutrino mass ordering. We explore how these shortcomings can be alleviated by the combination of the beam data with the atmospheric neutrino sample that would also be collected at the detector. We find that the combination not only improves very significantly these drawbacks, but also enhances both the CP violation discovery potential and the precision in the measurement of the CP violating phase, for which the facility was originally optimized, by lifting parametric degeneracies. We then reassess the optimization of the ESS$\nu$SB setup when the atmospheric neutrino sample is considered, with an emphasis in performing a measurement of the CP violating phase as precise as possible. We find that for the presently preferred value of $\delta \sim -\pi /2$, shorter baselines and longer running time in neutrino mode would be optimal. In these conditions, a measurement better than $14^{\circ }$ would be achievable for any value of the ${\theta }_{23}$ octant and the mass ordering. Conversely, if present and next generation facilities were not able to discover CP violation, longer baselines and more even splitting between neutrino and neutrino modes would be preferable. These choices would allow a $5\sigma$ discovery of CP violation for around a $60\%$ of the possible values of $\delta$ and to determine its value with a precision around $6^{\circ }$ if it is close to $0$ or $\pi$.

Several comments and references added; matches published version in EPJ C

References in corpus (21)

• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Physics Potential of a Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande
• Physics potential of the CERN-MEMPHYS neutrino oscillation project
• Resolving parameter degeneracies in long-baseline experiments by atmospheric neutrino data
• Resolving Eight-Fold Neutrino Parameter Degeneracy by Two Identical Detectors with Different Baselines
• Mass hierarchy, 2-3 mixing and CP-phase with Huge Atmospheric Neutrino Detectors
• Physics with Beam Tau-Neutrino Appearance at DUNE
• Systematic uncertainties in long-baseline neutrino oscillations for large ${\theta }_{13}$
• Study of the performance of a large scale water-Cherenkov detector (MEMPHYS)
• Neutrino oscillations at DUNE with improved energy reconstruction
• Physics potential of T2KK: An extension of the T2K neutrino oscillation experiment with a far detector in Korea
• Interplay between Appearance and Disappearance Channels for Precision Measurements of ${\theta }_{23}$ and $\delta$
• Reassessing the sensitivity to leptonic CP violation
• Probing Neutrino Oscillation Parameters using High Power Superbeam from ESS
• Determining the Octant of ${\theta }_{23}$ at LBNE in conjunction with Reactor Experiments
• Solving the degeneracy of the lepton-flavor mixing angle theta_atm by the T2KK two detector neutrino oscillation experiment
• Re-evaluation of the T2KK physics potential with simulations including backgrounds
• Enhancing the hierarchy and octant sensitivity of ESS$\nu$SB in conjunction with T2K, NO$\nu$A and ICAL@INO
• Precision measurements on ${\delta }_{\text{CP}}$ in MOMENT
• Searching for sterile neutrinos at the ESS$\nu$SB

Cited by in corpus (17)

• Novel constraints on neutrino physics beyond the standard model from the CONUS experiment
• The European Spallation Source neutrino Super Beam Conceptual Design Report
• Particle Physics at the European Spallation Source
• Probing scalar dark matter oscillations with neutrino oscillations
• Exploring invisible neutrino decay at ESSnuSB
• European Spallation Source as a searching tool for an ultralight scalar field
• Testing Lepton Flavor Models at ESSnuSB
• Probing Lepton Flavor Models at Future Neutrino Experiments
• On T violation in non-standard neutrino oscillation scenarios
• Model-independent test of T violation in neutrino oscillations
• Improved sensitivities of ESS$\nu$SB from a two-detector fit
• The ESSnuSB design study: overview and future prospects
• Physics prospects with the second oscillation maximum at Deep Underground Neutrino Experiment
• Prospects and requirements of opaque detectors in accelerator neutrino experiments
• Determining Neutrino Mass Ordering with ICAL, JUNO and T2HK
• Constraining the isotropic CPT-odd coefficients of the Standard Model Extension by a combined DUNE and ESSnuSB analysis
• Physics reach of the ESSnuSB experiment