One-loop effective LFV Zlklm vertex from heavy neutrinos within the Mass Insertion Approximation

In this paper we study the effective lepton flavor violating vertex of an electroweak Z gauge boson and two charged leptons with different flavor, lk and lm, that is generated to one-loop in low scale seesaw models with right handed neutrinos whose masses are heavier than the electroweak scale. We f...

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Detalles Bibliográficos
Autores principales:	Herrero, Maria J., Marcano, Xabier, Morales, Roberto A., Szynkman, Alejandro Andrés
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2018
Materias:	Física Particle physics Vertex (geometry) Physics Yukawa potential Seesaw molecular geometry Electroweak interaction Lepton Neutrino Electroweak scale Gauge boson Physics beyond the standard model
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126422
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126422
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física Particle physics Vertex (geometry) Physics Yukawa potential Seesaw molecular geometry Electroweak interaction Lepton Neutrino Electroweak scale Gauge boson Physics beyond the standard model
spellingShingle	Física Particle physics Vertex (geometry) Physics Yukawa potential Seesaw molecular geometry Electroweak interaction Lepton Neutrino Electroweak scale Gauge boson Physics beyond the standard model Herrero, Maria J. Marcano, Xabier Morales, Roberto A. Szynkman, Alejandro Andrés One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
topic_facet	Física Particle physics Vertex (geometry) Physics Yukawa potential Seesaw molecular geometry Electroweak interaction Lepton Neutrino Electroweak scale Gauge boson Physics beyond the standard model
description	In this paper we study the effective lepton flavor violating vertex of an electroweak Z gauge boson and two charged leptons with different flavor, lk and lm, that is generated to one-loop in low scale seesaw models with right handed neutrinos whose masses are heavier than the electroweak scale. We first compute the form factor describing this vertex by using the mass insertion approximation, where the flavor non-diagonal entries of the neutrino Yukawa coupling matrix are the unique origin, to one-loop level, of lepton flavor changing processes with charged leptons in the external legs. Then, by considering the proper large right handed neutrino mass expansion of the form factor, we derive a formula for the Zlklm effective vertex which is very simple and useful for fast phenomenological estimates. In the last part of this work we focus on the phenomenological applications of this vertex for simple and accurate estimates of the Z → lk ¯lm decay rates. Concretely, this vertex will allow us to conclude easily on the maximum allowed decay rates by present data in the inverse seesaw model. The found rates are promising, at the reach of future lepton colliders.
format	Articulo Articulo
author	Herrero, Maria J. Marcano, Xabier Morales, Roberto A. Szynkman, Alejandro Andrés
author_facet	Herrero, Maria J. Marcano, Xabier Morales, Roberto A. Szynkman, Alejandro Andrés
author_sort	Herrero, Maria J.
title	One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
title_short	One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
title_full	One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
title_fullStr	One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
title_full_unstemmed	One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation
title_sort	one-loop effective lfv <i>zl<sub>k</sub>l<sub>m</sub></i> vertex from heavy neutrinos within the mass insertion approximation
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/126422
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bdutipo_str	Repositorios
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One-loop effective LFV <i>Zl<SUB>k</SUB>l<SUB>m</SUB></i> vertex from heavy neutrinos within the Mass Insertion Approximation

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