Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-11-07
Phys.Rev. D69 (2004) 073006
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 5 figures, RevTeX4. Final version to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.69.073006
We investigate the effects of a nonzero leptonic mixing angle $\theta_{13}$ on the solar neutrino day-night asymmetry. Using a constant matter density profile for the Earth and well-motivated approximations, we derive analytical expressions for the $\nu_e$ survival probabilities for solar neutrinos arriving directly at the detector and for solar neutrinos which have passed through the Earth. Furthermore, we numerically study the effects of a non-zero $\theta_{13}$ on the day-night asymmetry at detectors and find that they are small. Finally, we show that if the uncertainties in the parameters $\theta_{12}$ and $\Delta m^2$ as well as the uncertainty in the day-night asymmetry itself were much smaller than they are today, this effect could, in principle, be used to determine $\theta_{13}$.
Blennow Mattias
Ohlsson Tommy
Snellman Hakan
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