Regresar

Resolving mass hierarchy and CP degeneracy by two identical detectors in Kamioka and Korea

Abstract:

We explore the possibility of simultaneous determination of neutrino mass hierarchy and the CP violating phase by using two identical detectors placed in Kamioka and Korea for the J-PARC neutrino beam. We demonstrate, under reasonable assumptions of systematic uncertainties, that the two-detector complex with each fiducial volume of 0.27 Mton has potential of resolving neutrino mass hierarchy up to sin2 2θ13 > 0.03 (0.055) at 2σ (3σ) CL for any values of δ and at the same time has the sensitivity to CP violation by 4 + 4 years running of νe and e appearance measurement. The significantly enhanced sensitivity is due to cancellation of systematic uncertainties between two identical detectors which receive the neutrino beam with the same energy spectrum in the absence of oscillations. © 2006 IOP Publishing Ltd.