A comparative study of long-baseline superbeams within LAGUNA for large ${\theta }_{13}$

Abstract

The Daya Bay and RENO experiments have recently observed a non-zero ${\theta }_{13}$ at more than $5\sigma$ CL. This has important consequences for future neutrino oscillation experiments. We analyze these within the LAGUNA design study which considers seven possible locations for a European neutrino observatory for proton decay, neutrino, and astroparticle physics. The megaton-scale detector would be an ideal target for a CERN-based neutrino beam with baselines ranging from 130 km to 2300 km. We perform a detailed study to assess the physics reach of the three detector options - a 440 kton water Čerenkov, a 100 kton liquid argon and a 50 kton liquid scintillator detector - at each of the possible locations, taking into account the recent measurement of ${\theta }_{13}$. We study the impact of the beam properties and detector performances on the sensitivity to CP-violation and the mass hierarchy. We find that a liquid argon or water Čerenkov detector can make a $3\sigma$ discovery of CP violation for $60$ of the parameter space for any of the baselines under consideration, although the results for the liquid argon detector placed at 130 km are slightly worse and only $40$ is achieved in this case. The performance of the liquid scintillator detector is affected by its level of neutral-current background at all baselines. A $3\sigma$ determination of the mass hierarchy is possible for all values of $\delta$, for the values of ${\theta }_{13}$ favoured at $3\sigma$ by Daya Bay and RENO, for almost all setups with $L\gtrsim 650$ km.

32 pages, 10 figures

References in corpus (24)

• Observation of electron-antineutrino disappearance at Daya Bay
• 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
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• General bounds on non-standard neutrino interactions
• Non-standard neutrino interactions in reactor and superbeam experiments
• Large gauge invariant non-standard neutrino interactions
• Physics potential of the CERN-MEMPHYS neutrino oscillation project
• Underground Neutrino Detectors for Particle and Astroparticle Science: the Giant Liquid Argon Charge Imaging ExpeRiment (GLACIER)
• Neutrino factory optimization for non-standard interactions
• Discovery reach for non-standard interactions in a neutrino factory
• Non-Standard Interaction Effects at Reactor Neutrino Experiments
• MEMPHYS:A large scale water Cerenkov detector at Fréjus
• A low energy neutrino factory for large ${\theta }_{13}$
• On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
• Which long-baseline neutrino experiments are preferable?
• Alternating ions in a $\beta$-beam to solve degeneracies
• Testing non-standard CP violation in neutrino propagation
• The $\tau$-contamination of the golden muon sample at the Neutrino Factory
• An intermediate gamma beta-beam neutrino experiment with long baseline
• Neutrino hierarchy from CP-blind observables with high density magnetized detectors
• A CERN-based high-intensity high-energy proton source for long baseline neutrino oscillation experiments with next-generation large underground detectors for proton decay searches and neutrino physics and astrophysics
• Summary report of MINSIS workshop in Madrid
• The density distribution in the Earth along the CERN-Pyhasalmi baseline and its effect on neutrino oscillations

Cited by in corpus (1)

• Systematic uncertainties in long-baseline neutrino oscillations for large ${\theta }_{13}$