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
19 papers · 1 filter
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…
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…
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…
Questions and prospects in quarkonium polarization measurements from proton-proton to nucleus-nucleus collisions
Pietro Faccioli
Polarization measurements are the best instrument to understand how quark and antiquark combine into the different quarkonium states, but no model has so far succeeded in explainin…
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…
Constrained SUSY seesaws with a 125 GeV Higgs
M. Hirsch, F. R. Joaquim, A. Vicente
Motivated by the ATLAS and CMS discovery of a Higgs-like boson with a mass around 125 GeV, and by the need of explaining neutrino masses, we analyse the three canonical SUSY versio…
The Hunt for New Physics in the Flavour Sector with up vector-like quarks
F. J. Botella, G. C. Branco, M. Nebot
We analyse the possible presence of New Physics (NP) in the Flavour Sector and evaluate its potential for solving the tension between the experimental values of $\AJPKs$ and $\BTNu…
Scalar-particle self-energy amplitudes and confinement in Minkowski space
Elmar P. Biernat, Franz Gross, Teresa Peña +1
We analyze the analytic structure of the Covariant Spectator Theory (CST) contribution to the self-energy amplitude for a scalar particle in a ϕ^2 χ-theory. To this end we derive d…
Measuring heavy neutrino couplings at the LHC
J. A. Aguilar-Saavedra, F. R. Joaquim
The existence of heavy neutrinos mediating neutrino masses via a type-I seesaw can be directly probed at the LHC, or indirectly in rare lepton flavor-violating processes. The syner…
Lepton flavour violation: physics potential of a Linear Collider
A. Abada, A. J. R. Figueiredo, J. C. Romao +1
We revisit the potential of a Linear Collider concerning the study of lepton flavour violation, in view of new LHC bounds and of the (very) recent developments in lepton physics. W…
Probing the scalar-pseudoscalar mixing in the 125 GeV Higgs particle with current data
A. Barroso, P. M. Ferreira, Rui Santos +1
LHC has found hints for a Higgs particle of 125 GeV. We investigate the possibility that such a particle is a mixture of scalar and pseudoscalar states. For definiteness, we concen…
The mu - e Conversion in Nuclei, mu --> e gamma, mu --> 3e Decays and TeV Scale See-Saw Scenarios of Neutrino Mass Generation
D. N. Dinh, A. Ibarra, E. Molinaro +1
We perform a detailed analysis of lepton flavour violation (LFV) within minimal see-saw type extensions of the Standard Model (SM), which give a viable mechanism of neutrino mass g…
Geometrical CP violation from non-renormalisable scalar potentials
Ivo de Medeiros Varzielas, David Emmanuel-Costa, Philipp Leser
We consider in detail the non-renormalisable scalar potential of three Higgs doublets transforming as an irreducible triplet of Delta(27) or Delta(54). We start from a renormalisab…
Observation of chi_c and chi_b nuclear suppression via dilepton polarization measurements
Pietro Faccioli, Joao Seixas
We demonstrate that it is possible to use the polarization of vector quarkonia, measured from dilepton event samples, as an instrument to study the suppression of chi_c and chi_b i…
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…
Search for new physics with neutrinos at Radioactive Ion Beam facilities
Catalina Espinoza, Rimantas Lazauskas, Cristina Volpe
We propose applications of Radioactive Ion Beam facilities to investigate physics beyond the Standard Model. In particular, we focus on the possible measurement of coherent neutrin…