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Testing the solar LMA region with KamLAND data

Abhijit Bandyopadhyay1, Sandhya Choubey2, Srubabati Goswami3, Raj Gandhi3 and D P Roy4

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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).


PACS

96.50.Vg Energetic particles

96.50.S- Cosmic rays

96.60.Vg Particle emission, solar wind

14.60.Pq Neutrino mass and mixing

95.30.Cq Elementary particle processes

96.60.Jw Solar interior

Subjects

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 11 (November 2003)

Received 18 June 2003

Published 6 October 2003



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