Enhanced mu-e conversion in nuclei in the inverse seesaw model

F. Deppisch (DESY); J. W. F. Valle (Valencia U. IFIC); T. S. Kosmas (Ioannina U.)

Enhanced mu-e conversion in nuclei in the inverse seesaw model

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arxiv hep-ph/0512360 v1 pith:TW3YMNRB submitted 2005-12-29 hep-ph nucl-th

Enhanced mu-e conversion in nuclei in the inverse seesaw model

F. Deppisch (DESY) , T. S. Kosmas (Ioannina U.) , J. W. F. Valle (Valencia U. IFIC) This is my paper

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keywords conversionmu-emodelinverseseesawcontributionslagrangianneutrino

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We investigate nuclear mu-e conversion in the framework of an effective Lagrangian arising from the inverse seesaw model of neutrino masses. We consider lepton flavour violation interactions that arise from short range (non-photonic) as well as long range (photonic) contributions. Upper bounds for the LFV parameters characterizing mu-e conversion are derived in the inverse seesaw model Lagrangian using the available limits on the mu-e conversion branching ratio, as well as the expected sensitivities of upcoming experiments. We comment on the relative importance of these two types of contributions and their relationship with the measured solar neutrino mixing angle theta_12 and the dependence on theta_13. Finally we show how the LFV mu-e conversion and the mu -> e gamma rates are strongly correlated in this model.

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