70 citations · 875 across the 30 of their papers we have counts for
33 papers
Computing Tools for Effective Field Theories
Jason Aebischer, Matteo Fael, Javier Fuentes-Martín +30
In recent years, theoretical and phenomenological studies with effective field theories have become a trending and prolific line of research in the field of high-energy physics. In…
Non-supersymmetric SO(10) models with Gauge and Yukawa coupling unification
Abdelhak Djouadi, Renato Fonseca, Ruiwen Ouyang +1
We study a non-supersymmetric SO(10) Grand Unification Theory with a very high energy intermediate symmetry breaking scale in which not only gauge but also Yukawa coupling unificat…
A triplet gauge boson with hypercharge one
Renato M. Fonseca
A vector boson with the quantum numbers under could in principle couple with the Higgs field via the…
Boundedness from below of SU(n) potentials
Renato M. Fonseca
Vacuum stability requires that the scalar potential is bounded from below. Whether or not this is true depends on the scalar quartic interactions alone, but even so the analysis is…
Explaining the SM flavor structure with grand unified theories
Renato M. Fonseca
We do not know why there are three fermion families in the Standard Model (SM), nor can we explain the observed pattern of fermion masses and mixing angles. Standard grand unified…
GroupMath: A Mathematica package for group theory calculations
Renato M. Fonseca
GroupMath is a Mathematica package which performs several calculations related to semi-simple Lie algebras and the permutation groups, both of which are important in particle physi…
Flavorgenesis
Andreas Ekstedt, Renato M. Fonseca, Michal Malinský
We present a model where all fermions are contained in a single irreducible representation of an SU(19) gauge symmetry group. If there is only one scalar field, Yukawa interactions…
anomalies and neutrino mass
Carolina Arbeláez, Ricardo Cepedello, Renato M. Fonseca +1
Motivated by the experimentally observed deviations from standard model predictions, we calculate the anomalous magnetic moments for in a neutrino mass model…
Neutrino masses beyond the minimal seesaw
Ricardo Cepedello, Renato Fonseca, Martin Hirsch
The simplest possibility to generate small Majorana neutrino masses is the seesaw mechanism. However, the smallness of the observed neutrino masses can also be understood, if neutr…
Enumerating the operators of an effective field theory
Renato M. Fonseca
Until recently little was known about the high-dimensional operators of the standard model effective field theory (SMEFT). However, in the past few years the number of these operat…
Violation of lepton number in 3 units
Renato M. Fonseca
The number of leptons may or may not be a conserved quantity. The Standard Model predicts that it is (in perturbative processes), but there is the well known possibility that new p…
Systematic classification of three-loop realizations of the Weinberg operator
Ricardo Cepedello, Renato M. Fonseca, Martin Hirsch
We study systematically the decomposition of the Weinberg operator at three-loop order. There are more than four thousand connected topologies. However, the vast majority of these…
High-dimensional neutrino masses
G. Anamiati, Oscar Castillo-Felisola, Renato M. Fonseca +2
For Majorana neutrino masses the lowest dimensional operator possible is the Weinberg operator at . Here we discuss the possibility that neutrino masses originate from higher…
processes
Renato M. Fonseca, Martin Hirsch
We discuss the experimental prospects for observing processes which violate lepton number () in four units (or more). First, we reconsider neutrinoless quadruple beta decay, de…
processes: Proton decay and LHC
Renato M. Fonseca, Martin Hirsch, Rahul Srivastava
We discuss lepton number violation in three units. From an effective field theory point of view, processes can only arise from dimension 9 or higher operators. These operato…
Quasi Dirac neutrino oscillations
G. Anamiati, R. M. Fonseca, M. Hirsch
Dirac neutrino masses require two distinct neutral Weyl spinors per generation, with a special arrangement of masses and interactions with charged leptons. Once this arrangement is…
The Sym2Int program: going from symmetries to interactions
Renato M. Fonseca
Model builders often need to find the most general Lagrangian which can be constructed from a given list of fields. These fields are actually representations of the Lorentz and gau…
Gauge vectors and double beta decay
Renato M. Fonseca, Martin Hirsch
We discuss contributions to neutrinoless double beta () decay involving vector bosons. The starting point is a list of all possible vector representations that may contribute…
Lepton number violation in 331 models
Renato M. Fonseca, Martin Hirsch
Different models based on the extended (331) gauge group have been proposed over the past four decades. Yet, despite being an active rese…
A flipped 331 model
Renato M. Fonseca, Martin Hirsch
Models based on the extended (331) gauge group usually follow a common pattern: two families of left-handed quarks are placed in anti-tri…
Roots of unity and lepton mixing patterns from finite flavour symmetries
R. M. Fonseca, W. Grimus
The classification of lepton mixing matrices from finite residual symmetries is reviewed, with emphasis on the role of vanishing sums of roots of unity for the solution of this pro…
Consistency of the triplet seesaw model revisited
Cesar Bonilla, Renato M. Fonseca, José W. F. Valle
Adding a scalar triplet to the Standard Model is one of the simplest ways of giving mass to neutrinos, providing at the same time a mechanism to stabilize the theory's vacuum. In t…
Vacuum stability with spontaneous violation of lepton number
Cesar Bonilla, Renato M. Fonseca, José W. F. Valle
The vacuum of the Standard Model is known to be unstable for the measured values of the top and Higgs masses. Here we show how vacuum stability can be achieved naturally if lepton…
SU(5)-inspired double beta decay
Renato M. Fonseca, Martin Hirsch
The short-range part of the neutrinoless double beta amplitude is generated via the exchange of exotic particles, such as charged scalars, leptoquarks and/or diquarks. In order to…