214 citations · 2.6k across the 71 of their papers we have counts for
52 papers · 1 filter
Minimal U(1) two-Higgs-doublet models for quark and lepton flavour
J. R. Rocha, H. B. Câmara, R. G. Felipe +1
In the context of the 2HDM, and assuming that neutrinos acquire masses via the Weinberg operator, we perform a systematic analysis to determine the minimal quark and lepton flavour…
Scalar-singlet assisted leptogenesis with CP violation from the vacuum
D. M. Barreiros, H. B. Câmara, R. G. Felipe +1
In the vanilla type-I seesaw leptogenesis scenario, CP violation required to generate the lepton asymmetries in the heavy Majorana neutrino decays stem from complex Dirac-type Yuka…
Minimal inverse-seesaw mechanism with Abelian flavour symmetries
H. B. Camara, R. G. Felipe, F. R. Joaquim
We study the phenomenology of the minimal inverse-seesaw model supplemented with Abelian flavour symmetries. To ensure maximal predictability, we establish the most restric…
Dirac neutrinos in the 2HDM with restrictive Abelian symmetries
S. S. Correia, R. G. Felipe, F. R. Joaquim
Recently, there has been a growing interest in extensions of the Standard Model in which naturally small Dirac neutrino masses arise due to existence of a symmetry which protects n…
Combining texture zeros with a remnant CP symmetry in the minimal type-I seesaw
D. M. Barreiros, R. G. Felipe, F. R. Joaquim
In the framework of the two right-handed neutrino seesaw model, we consider maximally-restrictive texture-zero patterns for the lepton Yukawa coupling and mass matrices, together w…
The minimal type-I seesaw model with maximally-restricted texture zeros
D. M. Barreiros, R. G. Felipe, F. R. Joaquim
In the context of Standard Model (SM) extensions, the seesaw mechanism provides the most natural explanation for the smallness of neutrino masses. In this work we consider the most…
More about unphysical zeroes in quark mass matrices
David Emmanuel-Costa, Ricardo Gonzalez Felipe
We look for all weak bases that lead to texture zeroes in the quark mass matrices and contain a minimal number of parameters in the framework of the standard model. Since there are…
Maximally restrictive leptonic texture zeros in two-Higgs-doublet models
R. Gonzalez Felipe, H. Serodio
The implementation of maximally restrictive texture zeros in the leptonic sector is investigated in the context of two-Higgs-doublet models with Majorana neutrinos. After analyzing…
Neutrino observables from predictive flavour patterns
Luis M. Cebola, David Emmanuel-Costa, Ricardo Gonzalez Felipe
We look for predictive flavour patterns of the effective Majorana neutrino mass matrix that are compatible with current neutrino oscillation data. Our search is based on the assump…
Confronting predictive texture zeros in lepton mass matrices with current data
Luís M. Cebola, David Emmanuel-Costa, Ricardo González Felipe
Several popular Ansätze of lepton mass matrices that contain texture zeros are confronted with current neutrino observational data. We perform a systematic -analysis in a wide…
Anomaly-free U(1) gauge symmetries in neutrino seesaw flavor models
Luis M. Cebola, David Emmanuel-Costa, Ricardo Gonzalez Felipe
Adding right-handed neutrino singlets and/or fermion triplets to the particle content of the Standard Model allows for the implementation of the seesaw mechanism to give mass to ne…
Baryogenesis through split Higgsogenesis
Sacha Davidson, Ricardo Gonzalez Felipe, H. Serodio +1
We study the cosmological evolution of asymmetries in the two-Higgs doublet extension of the Standard Model, prior to the electroweak phase transition. If Higgs flavour-exchanging…
Neutrino masses and mixing in A4 models with three Higgs doublets
R. Gonzalez Felipe, H. Serodio, Joao P. Silva
We study neutrino masses and mixing in the context of flavor models with A4 symmetry, three scalar doublets in the triplet representation, and three lepton families. We show that t…
Models with three Higgs doublets in the triplet representations of A4 or S4
R. Gonzalez Felipe, H. Serodio, Joao P. Silva
We consider the quark sector of theories containing three scalar SU(2)_L doublets in the triplet representation of A4 (or of S4) and three generations of quarks in arbitrary A4 (or…
Flavoured CP asymmetries for type II seesaw leptogenesis
R. Gonzalez Felipe, F. R. Joaquim, H. Serodio
A novel contribution to the leptonic CP asymmetries in type II seesaw leptogenesis scenarios is obtained for the cases in which flavor effects are relevant for the dynamics of lept…
Spontaneous leptonic CP violation and nonzero
G. C. Branco, R. Gonzalez Felipe, F. R. Joaquim +1
We consider a simple extension of the Standard Model by adding two Higgs triplets and a complex scalar singlet to its particle content. In this framework, the CP symmetry is sponta…
Leptonic CP violation
G. C. Branco, R. Gonzalez Felipe, F. R. Joaquim
Several topics on CP violation in the lepton sector are reviewed. A few theoretical aspects concerning neutrino masses, leptonic mixing, and CP violation will be covered, with spec…
Neutrinos and the matter-antimatter asymmetry in the Universe
R. Gonzalez Felipe
The discovery of neutrino oscillations provides a solid evidence for nonzero neutrino masses and leptonic mixing. The fact that neutrino masses are so tiny constitutes a puzzling p…
SU(5)xSU(5) unification revisited
David Emmanuel-Costa, Edison T. Franco, Ricardo Gonzalez Felipe
The idea of grand unification in a minimal supersymmetric SU(5)xSU(5) framework is revisited. It is shown that the unification of gauge couplings into a unique coupling constant ca…
Magnetized strangelets at finite temperature
R. Gonzalez Felipe, E. Lopez Fune, D. Manreza Paret +1
The main properties of magnetized strangelets, namely, their energy per baryon, radius and electric charge, are studied. Temperature effects are also taken into account in order to…
Leptonic mixing, family symmetries, and neutrino phenomenology
I. de Medeiros Varzielas, R. Gonzalez Felipe, H. Serodio
Tribimaximal leptonic mixing is a mass-independent mixing scheme consistent with the present solar and atmospheric neutrino data. By conveniently decomposing the effective neutrino…
Constraints on leptogenesis from a symmetry viewpoint
R. Gonzalez Felipe, H. Serodio
It is shown that type I seesaw models based on the standard model Lagrangian extended with three heavy Majorana right-handed fields do not have leptogenesis in leading order, if th…
Resonant leptogenesis and tribimaximal leptonic mixing with A4 symmetry
G. C. Branco, R. Gonzalez Felipe, M. N. Rebelo +1
We investigate the viability of thermal leptogenesis in type-I seesaw models with leptonic flavour symmetries that lead to tribimaximal neutrino mixing. We consider an effective th…
Anomaly-free constraints in neutrino seesaw models
D. Emmanuel-Costa, Edison T. Franco, R. Gonzalez Felipe
The implementation of seesaw mechanisms to give mass to neutrinos in the presence of an anomaly-free U(1)_X gauge symmetry is discussed in the context of minimal extensions of the…