Abstract
A global analysis of the data from all the solar neutrino experiments combined with the recent KamLAND data is presented. A formula frequently used in the literature gives survival probability for three active solar neutrino flavours in terms of a suitably modified two-flavour survival probability. Corrections to this formula, which depend on θ13 and δm231, are calculated. For the mass scale suggested by the atmospheric neutrino experiments the contributions of δm231 to these corrections are found to be negligible. The role of θ13 in solar neutrino physics is elaborated. For electron neutrino oscillations into another active flavour, we find best fit values of tan2 θ12 ∼ 0.46, tan2 θ13 ∼ 0 and δm221 ∼ 7.1 × 10−5 eV2. It is found that the combined solar neutrino and KamLAND data provide the limit cos4 θ13 > 0.8 at the 90% confidence level.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
