New limits on nucleon decay modes to neutrinos

New limits on neutron decay to 3 and 5 neutrinos based on Kamioka data [1] are derived by evaluating the bremsstrahlung photon emission probability during decay. One finds that τ(n → 3ν)BR > 2.3 1027yr(90% CL) and τ(n → 5ν)BR > 1.7 1027yr(90% CL).