Testing the solar LMA region with KamLAND data

Abstract

We investigate the potential of 3 kiloton-years (kTy) of KamLAND data to further constrain the Δm² and tan²θ values compared to those presently allowed by existing KamLAND and global solar data. We study the extent, dependence and characteristics of this sensitivity in and around the two parts of the LMA region that are currently allowed. Our analysis with 3 kTy simulated spectra shows that KamLAND spectrum data by itself can constrain Δm² with high precision. Combining the spectrum with global solar data further tightens the constraints on allowed values of tan²θ and Δm². We also study the effects of future neutral current data with a total error of 7% from the Sudbury Neutrino Observatory. We find that these future measurements offer the potential of considerable precision in determining the oscillation parameters (specially the mass parameter).