IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Effective LFV H li lj vertex from right-handed neutrinos within the Mass Insertion Approximation (arXiv:1612.09290 [hep-ph])
Autor/es:
XABIER MARCANO; MARÍA J. HERRERO; ALEJANDRO SZYNKMAN; ERNESTO ARGANDA; ROBERTO MORALES
Revista:
PHYSICAL REVIEW D
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2017 vol. 95 p. 950291 - 9502926
ISSN:
1550-7998
Resumen:
In this work we present a new computation of the Lepton Flavor ViolatingHiggs boson decays that are generated radiatively to one-loop from heavyright-handed neutrinos. We work within the context of the Inverse Seesaw modelwith three νR and three extra singlets X, but the results could begeneralized to other Low Scale Seesaw models. The novelty of our computation isthat it uses a completely different method by means of the Mass InsertionApproximation which works with the electroweak interaction states instead ofthe usual 9 physical neutrino mass eigenstates of the Inverse Seesaw model.This method also allows us to write the analytical results explicitly in termsof the most relevant model parameters, that are the neutrino Yukawa couplingmatrix Yν and the right-handed mass matrix MR, which is very convenientfor a phenomenological analysis. This Yν matrix, being genericallynon-diagonal in flavor space, is the only responsible for the induced chargedLepton Flavor Violating processes of our interest. We perform the calculationof the decay amplitude up to order (Y2ν+Y4ν). We also studynumerically the goodness of the Mass Insertion Approximation results. In thelast part we present the computation of the relevant one-loop effective vertexHℓiℓj for the Lepton Flavor Violating Higgs decay which is derivedfrom a large MR mass expansion of the form factors. We believe that oursimple formula found for this effective vertex can be of interest for otherresearchers who wish to estimate the H→ℓiℓ¯j rates in a fastway in terms of their own preferred input values for the relevant modelparameters Yν and MR.