Majorana neutrino masses in the renormalization group equations for lepton flavor violation

Sacha Davidson (1) , Martin Gorbahn , Matthew Leak

1 LUPM - Laboratoire Univers et Particules de Montpellier

We suppose that the observed neutrino masses can be parametrized by a lepton number violating dimension-five operator, and calculate the mixing of double insertions of this operator into lepton flavor changing dimension-six operators of the standard model effective theory. This allows to predict the log-enhanced, but mν2-suppressed lepton flavor violation that is generic to high-scale Majorana neutrino mass models. We also consider the two Higgs doublet model, where the second Higgs allows the construction of three additional dimension-five operators, and evaluate the corresponding anomalous dimensions. The sensitivity of current searches for lepton flavor violation to these additional Wilson coefficients is then examined.

Mots clés: Higgs particle: doublet: 2; operator: dimension: 6; operator: dimension: 5; effective field theory; renormalization group; mass: energy dependence; neutrino: Majorana: mass; lepton number: violation; lepton: flavor: violation; Beyond the standard model; new physics

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Sacha Davidson, Martin Gorbahn, Matthew Leak. Majorana neutrino masses in the renormalization group equations for lepton flavor violation. Physical Review D, 2018, 98 (9), pp.095014. ⟨10.1103/PhysRevD.98.095014⟩. ⟨hal-01851259⟩