2.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto Superior TécnicoPT201 papers
- University of LisbonPT82 papers
- Universidade Técnica de LisboaPT54 papers
- Universitat de ValènciaES44 papers
- Instituto Politécnico de LisboaPT30 papers
- Instituto de Física CorpuscularES16 papers
- Thomas Jefferson National Accelerator FacilityUS15 papers
- European Organization for Nuclear ResearchCH13 papers
- Centre National de la Recherche ScientifiqueFR12 papers
- Consejo Superior de Investigaciones CientíficasES10 papers
- Centro de Física Teórica e Computacional9 papers
- University of ÉvoraPT9 papers
24 papers · 1 filter
Could the LHC two-photon signal correspond to the heavier scalar in two-Higgs-doublet models?
P. M. Ferreira, Rui Santos, Marc Sher +1
LHC has reported tantalizing hints for a Higgs boson of mass 125 GeV decaying into two photons. We focus on two-Higgs-doublet Models, and study the interesting possibility that the…
Phenomenology of TeV Scale See-Saw Mechanism
Emiliano Molinaro
We review the low energy constraints on type I see-saw extensions of the Standard Model in which the scale of new physics, associated to lepton number violation, can be probed at c…
Possible trace of neutrino nonstandard interactions in the supernova
C. R. Das, Joao Pulido
Neutrino non-standard interactions (NSI), previously introduced for the sun, are studied in the supernova context. For normal hierarchy the probability for electron neutrinos and a…
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…
Colour flux-tubes in static Pentaquark and Tetraquark systems
Pedro Bicudo, Nuno Cardoso, Marco Cardoso
The colour fields created by the static tetraquark and pentaquark systems are computed in quenched SU(3) lattice QCD, with gauge invariant lattice operators, in a 24^3 x 48 lattice…
Determining the dark matter mass with DeepCore
Chitta R. Das, Olga Mena, Sergio Palomares-Ruiz +1
Cosmological and astrophysical observations provide increasing evidence of the existence of dark matter in our Universe. Dark matter particles with a mass above a few GeV can be ca…
Form Factors of Few-Body Systems: Point Form Versus Front Form
María Gómez-Rocha, Elmar. P. Biernat, Wolfgang Schweiger
We present a relativistic point-form approach for the calculation of electroweak form factors of few-body bound states that leads to results which resemble those obtained within th…
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…
A Common Framework for Dark Matter, Leptogenesis and Neutrino Masses
François-Xavier Josse-Michaux, Emiliano Molinaro
We study a seesaw-type extension of the Standard Model in which the symmetry group is enlarged by a global U(1). We introduce adequate scalar and fermion representations which natu…
Running soft parameters in SUSY models with multiple U(1) gauge factors
Renato M. Fonseca, Michal Malinsky, Werner Porod +1
We generalize the two-loop renormalization group equations for the parameters of the softly broken SUSY gauge theories given in the literature to the most general case when the gau…
Colour Fields Computed in SU(3) Lattice QCD for the Static Tetraquark System
N. Cardoso, M. Cardoso, P. Bicudo
The colour fields created by the static tetraquark system are computed in quenched SU(3) lattice QCD, in a 24^3 x 48 lattice at beta=6.2 corresponding to a lattice spacing a=0.0726…
Geometrical CP Violation
Ivo de Medeiros Varzielas, David Emmanuel-Costa
Spontaneous CP-violating phases that do not depend on the parameters of the Higgs sector - the so-called calculable phases - are investigated. The simplest realization is in models…
Calculating the renormalisation group equations of a SUSY model with Susyno
Renato M. Fonseca
Susyno is a Mathematica package dedicated to the computation of the 2-loop renormalisation group equations of a supersymmetric model based on any gauge group (the only exception be…
Neutrino nonstandard interactions in the supernova
C. R. Das, Joao Pulido
Neutrino nonstandard interactions (NSI) were investigated earlier in the solar case and were shown to reduce the tensions between the data and the large mixing angle solution predi…
Theory and phenomenology of two-Higgs-doublet models
G. C. Branco, P. M. Ferreira, L. Lavoura +3
We discuss theoretical and phenomenological aspects of two-Higgs-doublet extensions of the Standard Model. In general, these extensions have scalar mediated flavour changing neutra…
Probing the supersymmetric type III seesaw: LFV at low-energies and at the LHC
A. Abada, A. J. R. Figueiredo, J. C. Romao +1
We consider a supersymmetric type III seesaw, where the additional heavy states are embedded into complete SU(5) representations to preserve gauge coupling unification. Complying w…
Yukawa Alignment in a Multi Higgs Doublet Model: An effective approach
H. Serodio
In the two Higgs doublet model, natural flavour conservation can be achieved through the use of a discrete Z2 symmetry. A less restrictive condition is the requirement of alignment…
The next-generation liquid-scintillator neutrino observatory LENA
Michael Wurm, John F. Beacom, Leonid B. Bezrukov +74
We propose the liquid-scintillator detector LENA (Low Energy Neutrino Astronomy) as a next-generation neutrino observatory on the scale of 50 kt. The outstanding successes of the B…
Constraining the Milky Way Dark Matter Density Profile with Gamma-Rays with Fermi-LAT
Nicolas Bernal, Sergio Palomares-Ruiz
We study the abilities of the Fermi-LAT instrument on board of the Fermi mission to simultaneously constrain the Milky Way dark matter density profile and some dark matter particle…
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…
Two-Higgs Leptonic Minimal Flavour Violation
F. J. Botella, G. C. Branco, M. Nebot +1
We construct extensions of the Standard Model with two Higgs doublets, where there are flavour changing neutral currents both in the quark and leptonic sectors, with their strength…
Lepton Number Violation in TeV Scale See-Saw Extensions of the Standard Model
A. Ibarra, E. Molinaro, S. T. Petcov
The low-energy neutrino physics constraints on the TeV scale type I see-saw scenarios of neutrino mass generation are revisited. It is shown that lepton charge (L) violation, assoc…
Nearest-Neighbour-Interactions from a minimal discrete flavour symmetry within SU(5) Grand Unification
D. Emmanuel-Costa, C. Simoes
A flavour symmetry based on Z_4 is analysed in the context of SU(5) Grand Unification with the standard fermionic content plus three right-handed neutrinos. The role of Z_4 is to f…
A soft origin for CKM-type CP violation
P. M. Ferreira, J. P. Silva, L. Lavoura
We present a two-Higgs-doublet model, with a $\mathbbm{Z}_3$ symmetry, in which CP violation originates solely in a soft (dimension-2) coupling in the scalar potential, and reveals…