Neutrino Mass Constraints on Decay and 0 !

نویسندگان

  • Gary Prézeau
  • Andriy Kurylov
چکیده

0031-9007= In this Letter, we show that upper limits on the neutrino mass translate into upper limits on the class of neutrino-matter interactions that can generate loop corrections to the neutrino mass matrix. We apply our results to and decays and derive model-independent limits on six of the ten parameters used to parametrize contributions to decay that do not belong to the standard model. These upper limits provide improved constraints on the five Michel parameters, ; 0; 00; ; 0, that exceed Particle Data Group constraints by at least one order of magnitude. For 0 !  we find, for the branching ratio, B 0 ! < 10 10.

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تاریخ انتشار 2005