Determining the oscillation parameters by Solar neutrinos and KamLAND

Abstract

The neutrino oscillation experiment KamLAND has given the first evidence for disappearance of ${\bar{\nu }}_e$ coming from nuclear reactors. We have combined their data with all the solar neutrino data assuming two flavor neutrino mixing and obtained allowed parameter regions which are compatible with the so-called large mixing angle MSW solution to the solar neutrino problem. The allowed regions in the plane of mixing angle and mass squared difference are now split into two islands at 99% C.L. We have speculated how these two islands can be separated in the near future. We have shown that a 50% reduction of the error on SNO neutral-current measurement can be important in establishing in each of these islands the true values of these parameters lie. We also have simulated KamLAND positron energy spectrum after 1 year of data taking, assuming the current best fitted values of the oscillation parameters, combined it the with current solar neutrino data and showed how these two split islands can be modified.

16 pages and 9 figures, final version to appear in Phys. Lett. B

References in corpus (7)

• First Results from KamLAND: Evidence for Reactor Anti-Neutrino Disappearance
• Non-adiabatic Level Crossing in Resonant Neutrino Oscillations
• Solar neutrino oscillation parameters after first KamLAND results
• Solar Neutrinos Before and After KamLAND
• KamLAND and solar neutrino data eliminate the LOW solution
• The Solar Neutrino Problem after the first results from Kamland
• After Sno and Before Kamland: Present and Future of Solar and Reactor Neutrino Physics

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