Neutrino spin oscillations in gravitational fields in noncommutative spaces

We study neutrino spin oscillations in gravitational fields in noncommutative spaces. For the Schwarzschild metric the maximum frequency decreases as the noncommutativity parameter increases. In the case of the Reissner-Nordstrom (RN or Re-No) metric, the maximum frequency of oscillation is a monotonically increasing function of the noncommutativity parameter. In both cases, the frequency of spin oscillations decreases as the distance from the gravitational source grows. We present a phenomenological application of our results. It is also shown that the noncommutativity parameter is bounded as root theta > 0.1 l(P).