publication . Article . Preprint . 2016

Perturbativity in the seesaw mechanism

Takehiko Asaka; Takanao Tsuyuki;
Open Access English
  • Published: 01 Feb 2016
  • Publisher: Elsevier
Abstract
We consider the Standard Model extended by right-handed neutrinos to explain massive neutrinos through the seesaw mechanism. The new fermion can be observed when it has a sufficiently small mass and large mixings to left-handed neutrinos. If such a particle is the lightest right-handed neutrino, its contribution to the mass matrix of active neutrinos needs to be canceled by that of a heavier one. Yukawa couplings of the heavier one are then larger than those of the lightest one. We show that the perturbativity condition gives a severe upper bound on the mixing of the lightest right-handed neutrino, depending on the masses of heavier ones. Models of high energy p...
Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::Experiment
free text keywords: Physics, QC1-999, High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear and High Energy Physics, Neutrino oscillation, Yukawa potential, Standard Model, Seesaw mechanism, Leptogenesis, Nuclear physics, Physics beyond the Standard Model, Neutrino, Particle physics, Sterile neutrino
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