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
31 papers · 2 filters
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…
Implications of the LHC two-photon signal for two-Higgs-doublet models
P. M. Ferreira, Rui Santos, Marc Sher +1
We study the implications for Two Higgs Doublet Models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons.…
Invariants, Alignment and the Pattern of Fermion Masses and Mixing
G. C. Branco, J. I. Silva-Marcos
We show that the main features of the pattern of fermion masses and mixing can be expressed in terms of simple relations among weak-basis invariants. In the quark sector, we identi…
Towards Meson Spectroscopy Instead of Bump Hunting
George Rupp, Susana Coito, Eef van Beveren
Mesonic resonances are generally observed in data as narrow, moderately broad, or wide peaks in scattering or production processes. In the eyes of nearly all experimentalists, any…
Dark Matter and Leptogenesis in the Inverse Seesaw
Francois-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…
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…
Out of Medium Fragmentation from Long-Lived Jet Showers
Jorge Casalderrey-Solana, José Guilherme Milhano, Paloma Quiroga Arias
We study the time structure of vacuum jet evolution via a simple uncertainty principle estimate in the kinematic range explored by current heavy ion collisions at the LHC. We obser…
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…
Medium-induced color flow softens hadronization
A. Beraudo, J. G. Milhano, U. A. Wiedemann
Medium-induced parton energy loss, resulting from gluon exchanges between the QCD matter and partonic projectiles, is expected to underly the strong suppression of jets and high-$p…
Dark matter and LHC phenomenology in a left-right supersymmetric model
J. N. Esteves, M. Hirsch, W. Porod +3
Left-right symmetric extensions of the Minimal Supersymmetric Standard Model can explain neutrino data and have potentially interesting phenomenology beyond that found in minimal S…
N*(1535) electroproduction at high Q2
G. Ramalho, M. T. Pena, K. Tsushima
A covariant spectator quark model is applied to study the gamma N -> N*(1535) reaction in the large Q2 region. Starting from the relation between the nucleon and N*(1535) systems,…
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…
Jet quenching via jet collimation
J. Casalderrey-Solana, J. G. Milhano, U. Wiedemann
The strong modifications of dijet properties in heavy ion collisions measured by ATLAS and CMS provide important constraints on the dynamical mechanisms underlying jet quenching. I…
Suppression of high-pT particle production in AA collisions: the role of in-medium color-flow
A. Beraudo, J. G. Milhano, U. A. Wiedemann
The suppression of high-pT single-hadron spectra in heavy-ion collisions is usually interpreted as due to parton energy-loss of high-momentum quarks and gluons propagating in the p…
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…
Octet baryon electromagnetic form factors in a relativistic quark model
G. Ramalho, K. Tsushima
We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electro…
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…
Quasi-bound states in the continuum: a dynamical coupled-channel calculation of axial-vector charmed mesons
Susana Coito, George Rupp, Eef van Beveren
Masses and widths of the charmed axial-vector mesons , , , and are calculated nonperturbatively in the Resonance-Spectrum-Expansi…
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…