Determination of mass hierarchy with medium baseline reactor neutrino experiments

Abstract

We study the sensitivity of future medium baseline reactor antineutrino experiments on the neutrino mass hierarchy. By using the standard chi^2 analysis, we find that the sensitivity depends strongly on the baseline length L and the energy resolution (delta E/E)^2 = (a/sqrt{E/MeV})^2 + b^2, where a and b parameterize the statistical and systematic uncertainties, respectively. The optimal length is found to be L ~ 40-55 km, where a slightly shorter L in the range is preferred for poorer energy resolution. The running time needed to determine the mass hierarchy also depends strongly on the energy resolution; for a 5 kton detector (with 12% weight fraction of free proton) placed at L ~ 50 km away from a 20 GW_{th} reactor, three-sigma determination needs 14 years of running with a = 3% and b = 0.5%, which can be reduced to 5 years if a = 2% and b = 0.5%. On the other hand, the experiment can measure the mixing parameters accurately, achieving delta sin^2(2theta_{12}) ~ 4*10^{-3}, delta (m_2^2-m_1^2) ~ 0.03*10^{-5} eV^2, and delta |m_3^2 -m_1^2| ~ 0.007*10^{-3} eV^2, in 5 years, almost independently of the energy resolution for a < 3% and b < 1%. In order to compare our simple (Delta chi^2)_{min} results with those obtained by simulating many experiments, we develop an efficient method to estimate the uncertainty of (Delta chi^2)_{min}, and the probability for determining the right mass hierarchy by an experiment is presented as a function of the mean (Delta chi^2)_{min}.

19 pages, 9 figures, 1 table

References in corpus (8)

• Observation of electron-antineutrino disappearance at Daya Bay
• Improved Measurement of Electron Antineutrino Disappearance at Daya Bay
• Neutrino Mass Hierarchy Determination Using Reactor Antineutrinos
• Mass Hierarchy Determination Using Neutrinos from Multiple Reactors
• The Neutrino Mass Hierarchy at Reactor Experiments now that theta13 is Large
• Addendum: Neutrino Mass Hierarchy Determination Using Reactor Antineutrinos
• 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

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