Indirect limits on the CPT violating background in the neutrino sector

摘要

CPT violation in the neutrino sector. suggested as a new way to reconcile different neutrino anomalies, induces at the radiative level observable effects among charged leptons, where high-precision tests of the CPT symmetry are available. We show that, in the models with heavy right-handed Majorana neutrinos. constraints imposed by these experiments require CPT violation in neutrino spectrum he suppressed to a level undetectable for any conceivable neutrino experiment. We find that the CPT violation in the neutrino sector may evade indirect constraints only at the expense of light right-handed neutrinos with small Yukawa couplings to the Standard Model sector of by allowing non-locality well below the electroweak scale. (C) 2002 Published by Elsevier Science B.V. [References: 35]