NEUTRINO LEFT-RIGHT CONVERSION IN A LOCALLY FLUCTUATING MAGNETIC-FIELD

We analyze the consequences of the appearance of more than one resonan ce in the evolution equations of neutrinos interacting with a magnetic held in a scenario in which this field locally fluctuates around an e quilibrium profile. We use time ordered exponential operators and the stationary phase method to solve the involved integrals to show that i n this case neutrino left-right conversion probability is larger than the same probability calculated assuming only one resonance. Furthermo re, quantum interference terms can substantially modify the left-right conversion probability exceeding, in certain cases, by around 100% th e averaged classical probability. Concerning the solar neutrino case, such consequences of multiple resonances have to be taken into account in any attempt of solving the solar neutrino problem through a nonvan ishing neutrino magnetic moment.