W. Anthony Mann, Tomas Kafka, Jacob Schneps, Ozgur Altinok
We give an exact expression for the appearance probability P(nu_mu -> nu_e) describing neutrino oscillations in matter of constant density, derived using textbook quantum mechanics stratagems. Our formulation retains the clarity of an expansion in alpha = Delta m_{21}^2/Delta m_{31}^2 and sin2theta_{13} exhibited by the popular Cervera et al. formula [Nucl. Phys. B {\bf 579}, 17 (2000)] while providing greater precision for analytic evaluation of terrestrial oscillation baselines of thousands of kilometers.
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http://arxiv.org/abs/1204.6338
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