Exploring invisible neutrino decay at ESSnuSB

Abstract

We explore invisible neutrino decay in which a heavy active neutrino state decays into a light sterile neutrino state and present a comparative analysis of two baseline options, $540$km and $360$km, for the ESSnuSB experimental setup. Our analysis shows that ESSnuSB can put a bound on the decay parameter ${\tau }_3/m_3=2.64(1.68)\times 10^{-11}$s/eV for the baseline option of $360(540)$km at $3\sigma$. The expected bound obtained for $360$km is slightly better than the corresponding one of DUNE for a charged current (CC) analysis. Furthermore, we show that the capability of ESSnuSB to discover decay, and to measure the decay parameter precisely, is better for the baseline option of $540$km than that of $360$km. Regarding effects of decay in ${\delta }_{\mathrm{CP}}$ measurements, we find that in general the CP violation discovery potential is better in the presence of decay. The change in CP precision is significant if one assumes decay in data but no decay in theory.

22 pages, 10 figures, 4 tables, Version accepted for publication in JHEP

References in corpus (10)

• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu }_e$ interactions at the far detector
• Status of Oscillation plus Decay of Atmospheric and Long-Baseline Neutrinos
• Constraints on neutrino decay lifetime using long-baseline charged and neutral current data
• Systematic uncertainties in long-baseline neutrino oscillations for large ${\theta }_{13}$
• Study of the performance of a large scale water-Cherenkov detector (MEMPHYS)
• Probing Neutrino Oscillation Parameters using High Power Superbeam from ESS
• Routines for the diagonalization of complex matrices
• Enhancing the hierarchy and octant sensitivity of ESS$\nu$SB in conjunction with T2K, NO$\nu$A and ICAL@INO

Cited by in corpus (11)

• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Tau Neutrinos in the Next Decade: from GeV to EeV
• Particle Physics at the European Spallation Source
• How to Identify Different New Neutrino Oscillation Physics Scenarios at DUNE
• European Spallation Source as a searching tool for an ultralight scalar field
• Investigating the effects of Lorentz Invariance Violation on the CP-sensitivities of the Deep Underground Neutrino Experiment
• Improved sensitivities of ESS$\nu$SB from a two-detector fit
• Probing invisible neutrino decay with KM3NeT-ORCA
• Synergy between DUNE and T2HKK to probe Invisible Neutrino Decay
• Revisiting series expansions of neutrino oscillation and decay probabilities in matter
• Study of large extra dimension and neutrino decay at P2SO experiment