2.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto Superior TécnicoPT388 papers
- Centro de Física Teórica de Partículas54 papers
- University of ViennaAT37 papers
- Centre National de la Recherche ScientifiqueFR34 papers
- University of LisbonPT34 papers
- University of MississippiUS31 papers
- Universitat de ValènciaES27 papers
- California Institute of TechnologyUS25 papers
- University of CoimbraPT19 papers
- European Organization for Nuclear ResearchCH18 papers
- Instituto de TelecomunicaçõesPT18 papers
- Instituto Politécnico de LisboaPT17 papers
137 papers · 1 filter
Matrix model for deconfinement in a SU(Nc) gauge theory in 2+1 dimensions
Pedro Bicudo, Robert D. Pisarski, Elina Seel
We use an effective matrix model to study deconfinement in a pure SU(Nc) gauge theory, without quarks, in d=2+1 dimensions. Expanding about a constant background A0 field we constr…
Witten's loop in the flipped SU(5) unification
Michal Malinský, Carolina Arbeláez Rodríguez, Helena Kolešová
We study a very simple, yet potentially realistic renormalizable flipped SU(5) scenario in which the right-handed neutrino masses are generated at very high energies by means of a…
Witten's mechanism in the flipped SU(5) unification
Carolina Arbeláez, Helena Kolešová, Michal Malinský
We argue that the Witten's loop mechanism for the right-handed Majorana neutrino mass generation identified originally in the SO(10) grand unification context can be successfully a…
On baryogenesis from dark matter annihilation
Nicolas Bernal, Stefano Colucci, Francois-Xavier Josse-Michaux +2
We study in detail the conditions to generate the baryon asymmetry of the universe from the annihilation of dark matter. This scenario requires a low energy mechanism for thermal b…
Matrix model for deconfinement in an SU(2) gauge theory in 2+1 dimensions
Pedro Bicudo, Robert D. Pisarski, Elina Seel
We use matrix models to characterize deconfinement at a nonzero temperature T for an SU(2) gauge theory in three spacetime dimensions. At one loop order, the potential for a consta…
Neutrino mixing with revamped A4 flavour symmetry
S. Morisi, D. V. Forero, J. C. Romao +1
We suggest a minimal extension of the simplest A4 flavour model that can induce a nonzero theta13 value, as required by recent neutrino oscillation data from reactors and accelerat…
Five models for lepton mixing
P. M. Ferreira, L. Lavoura, P. O. Ludl
We produce five flavour models for the lepton sector. All five models fit perfectly well---at the one-sigma level---the existing data on the neutrino mass-squared differences and o…
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…
Octet to decuplet electromagnetic transition in a relativistic quark model
G. Ramalho, K. Tsushima
We study the octet to decuplet baryon electromagnetic transitions using the covariant spectator quark model, and predict the transition magnetic dipole form factors for those invol…
Extended evolution equations for neutrino propagation in astrophysical and cosmological environments
Cristina Volpe, Daavid Väänänen, Catalina Espinoza
We derive the evolution equations for a system of neutrinos interacting among themselves and with a matter background, based upon the Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hi…
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…
Flavour models for TM1 lepton mixing
Ivo de Medeiros Varzielas, Luís Lavoura
We present a framework for lepton flavour models such that the first column of the lepton mixing matrix is (2,-1,-1)/sqrt(6). We show that the flavour symmetry group adequate for t…
X(3872) is not a true molecule
Susana Coito, George Rupp, Eef van Beveren
A solvable coordinate-space model is employed to study the component of the X(3872) wave function, by coupling a confined state to the almost unbound…
Evading death by vacuum
A. Barroso, P. M. Ferreira, I. P. Ivanov +2
In the Standard Model, the Higgs potential allows only one minimum at tree-level. But the open possibility that there might be two scalar doublets enriches the vacuum structure, al…
Observing Higgs boson production through its decay into gamma-rays: A messenger for Dark Matter candidates
Nicolas Bernal, Celine Boehm, Sergio Palomares-Ruiz +2
In this Letter, we study the gamma-ray signatures subsequent to the production of a Higgs boson in space by dark matter annihilations. We investigate the cases where the Higgs boso…
An analysis of the influence of background subtraction and quenching on jet observables in heavy-ion collisions
Liliana Apolinário, Néstor Armesto, Leticia Cunqueiro
Subtraction of the large background in reconstruction is a key ingredient in jet studies in high-energy heavy-ion collisions at RHIC and the LHC. Here we address the question to wh…
Invariants and Flavour in the General Two-Higgs Doublet Model
F. J. Botella, G. C. Branco, M. N. Rebelo
The flavour structure of the general Two Higgs Doublet Model (2HDM) is analysed and a detailed study of the parameter space is presented, showing that flavour mixing in the 2HDM ca…
Phenomenology of WIMPy baryogenesis models
Nicolas Bernal, Francois-Xavier Josse-Michaux, Lorenzo Ubaldi
A possible connection between the abundances of baryonic and dark matter (DM) has been explored so far mostly in the context of the so-called asymmetric DM. Recently, a very differ…
Self-Organizing Neutrino Mixing Matrix
Ernest Ma
A new and novel idea for a predictive neutrino mass matrix is presented, using the non-Abelian discrete symmetry A(4) and the seesaw mechanism with only two heavy neutral fermion s…
Lattice QCD signal for a bottom-bottom tetraquark
Pedro Bicudo, Marc Wagner
Utilizing lattice QCD results for the potential of two static antiquarks and two dynamical quarks as well as quark model techniques for the dynamics of two heavy antiquarks in a cl…
Higgs Decays in the Low Scale Type I See-Saw Model
C. Garcia Cely, A. Ibarra, E. Molinaro +1
The couplings of the low scale type I see-saw model are severely constrained by the requirement of reproducing the correct neutrino mass and mixing parameters, by the non-observati…
A novel way of constraining WIMPs annihilations in the Sun: MeV neutrinos
Nicolas Bernal, Justo Martin-Albo, Sergio Palomares-Ruiz
Annihilation of dark matter particles accumulated in the Sun would produce a flux of high-energy neutrinos whose prospects of detection in neutrino telescopes and detectors have be…
mu-tau Interchange symmetry and lepton mixing
W. Grimus, L. Lavoura
We focus on the use of a mu-tau interchange symmetry to explain features of lepton mixing, especially maximal atmospheric neutrino mixing. We review two models which achieve this g…