Effective lepton flavor violating Hℓiℓj vertex from right-handed neutrinos within the mass insertion approximation

In this work we present a new computation of the lepton flavor violating Higgs boson decays that are generated radiatively to one-loop from heavy right-handed neutrinos. We work within the context of the inverse seesaw model with three νR and three extra singlets X, but the results could be generali...

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Detalles Bibliográficos
Autores principales:	Arganda Carreras, Ernesto, Herrero, M. J., Marcano, X., Morales, Roberto Aníbal, Szynkman, Alejandro Andrés
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2017
Materias:	Física Flavor changing neutral currents Electroweak radiative corrections Extensions of fermion sector Rare decays
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/97996 https://ri.conicet.gov.ar/11336/63631 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.095029 https://arxiv.org/abs/1612.09290
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-97996
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física Flavor changing neutral currents Electroweak radiative corrections Extensions of fermion sector Rare decays
spellingShingle	Física Flavor changing neutral currents Electroweak radiative corrections Extensions of fermion sector Rare decays Arganda Carreras, Ernesto Herrero, M. J. Marcano, X. Morales, Roberto Aníbal Szynkman, Alejandro Andrés Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
topic_facet	Física Flavor changing neutral currents Electroweak radiative corrections Extensions of fermion sector Rare decays
description	In this work we present a new computation of the lepton flavor violating Higgs boson decays that are generated radiatively to one-loop from heavy right-handed neutrinos. We work within the context of the inverse seesaw model with three νR and three extra singlets X, but the results could be generalized to other low scale seesaw models. The novelty of our computation is that it uses a completely different method by means of the mass insertion approximation which works with the electroweak interaction states instead of the usual 9 physical neutrino mass eigenstates of the inverse seesaw model. This method also allows us to write the analytical results explicitly in terms of the most relevant model parameters, that are the neutrino Yukawa coupling matrix Yν and the right-handed mass matrix MR, which is very convenient for a phenomenological analysis. This Yν matrix, being generically nondiagonal in flavor space, is the only one responsible for the induced charged lepton flavor violating processes of our interest. We perform the calculation of the decay amplitude up to order O(Yν2+Yν4). We also study numerically the goodness of the mass insertion approximation results. In the last part we present the computation of the relevant one-loop effective vertex Hij for the lepton flavor violating Higgs decay which is derived from a large MR mass expansion of the form factors. We believe that our simple formula found for this effective vertex can be of interest for other researchers who wish to estimate the H→īj rates in a fast way in terms of their own preferred input values for the relevant model parameters Yν and MR.
format	Articulo Preprint
author	Arganda Carreras, Ernesto Herrero, M. J. Marcano, X. Morales, Roberto Aníbal Szynkman, Alejandro Andrés
author_facet	Arganda Carreras, Ernesto Herrero, M. J. Marcano, X. Morales, Roberto Aníbal Szynkman, Alejandro Andrés
author_sort	Arganda Carreras, Ernesto
title	Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
title_short	Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
title_full	Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
title_fullStr	Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
title_full_unstemmed	Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation
title_sort	effective lepton flavor violating <i>hℓ<sub>i</sub>ℓ<sub>j</sub></i> vertex from right-handed neutrinos within the mass insertion approximation
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/97996 https://ri.conicet.gov.ar/11336/63631 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.095029 https://arxiv.org/abs/1612.09290
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Effective lepton flavor violating <i>Hℓ<SUB>i</SUB>ℓ<SUB>j</SUB></i> vertex from right-handed neutrinos within the mass insertion approximation

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