Abstract
We study the contributions of the nonstandard neutrino interactions to the rare meson decays of K+→π+νν̄ and D+→π+νν̄ . We show that both decays could provide strong constraints on the free parameters in the nonstandard neutrino interactions. We point out that the branching ratio of D+→π+νν̄ could be at the level of 10-8. © 2007 The American Physical Society.