An effective theory for Leptogenesis

Details An effective theory for Leptogenesis An effective theory for Leptogenesis

2003-05-13

arxiv.org/abs/hep-ph/0305131v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages. Based on the talk given at the XXXVIII Rencontres de Moriond (Electroweak Session)

Scientific paper

The effective Lagrangian for the seesaw model is derived. Besides the usual dimension-5 operator responsible for light neutrino masses, a dimension-6 operator is included which, for three or less heavy neutrino generations, provides a generic link between low-energy observables and all physical parameters of the high-energy seesaw Lagrangian. Leptogenesis can be then confirmed or ruled out through the measurement of neutrino masses and mixings and the exotic neutrino couplings originated from the dimension-6 operator.

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