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
12 papers · 1 filter
On a model with two zeros in the neutrino mass matrix
W. Grimus, L. Lavoura
We consider a Majorana neutrino mass matrix with , in the basis where the charged-lepton mass matrix is diagonal. W…
Supernovae constraints on models of dark energy revisited
M. C. Bento, O. Bertolami, N. M. C. Santos +1
We use the Type Ia Supernova gold sample data of Riess {\it et al} in order to constrain three models of dark energy. We study the Cardassian model, the Dvali-Turner gravity modifi…
Zeros of the inverted neutrino mass matrix
L. Lavoura
I investigate viable textures with two texture zeros for the inverted neutrino mass matrix, and present the predictions of those textures for the neutrino masses and for lepton mix…
Leptonic CP Violation and Neutrino Mass Models
Gustavo C. Branco, M. N. Rebelo
We discuss leptonic mixing and CP violation at low and high energies, emphasizing possible connections between leptogenesis and CP violation at low energies, in the context of lept…
Pion re-scattering operator in the S-matrix approach
V. Malafaia, J. Adam, M. T. Pena
The pion re-scattering operator for pion production, derived recently in time-ordered perturbation theory, is compared with the one following from the simple S-matrix construction.…
Natural braneworld inflation and baryogenesis
R. Gonzalez Felipe
In natural inflation models, the inflaton is a pseudo Nambu-Goldstone boson and the flatness of the potential is protected by shift symmetries. In this framework, a successful infl…
Softly broken lepton number L_e - L_μ- L_τwith non-maximal solar neutrino mixing
W. Grimus, L. Lavoura
We consider the most general neutrino mass matrix which leads to , and present the formulae needed for obtaining the neutrino masses and mixing parameters in that case.…
How Long Could We Live?
Ilja Dorsner, Pavel Fileviez Perez
We investigate model independent upper bounds on total proton lifetime in the context of Grand Unified Theories with the Standard Model matter content. We find them to be $τ_p \leq…
Renormalization of the neutrino mass operators in the multi-Higgs-doublet Standard Model
W. Grimus, L. Lavoura
We derive the renormalization group equations (RGE) for the flavour coupling matrices of the effective dimension-five operators which yield Majorana neutrino masses in the multi-Hi…
Flavour structure and proton decay in 6D orbifold GUTs
W. Buchmuller, L. Covi, D. Emmanuel-Costa +1
We study proton decay in a supersymmetric {\sf SO(10)} gauge theory in six dimensions compactified on an orbifold. The dimension-5 proton decay operators are forbidden by R-symmetr…
Extension of the Buchalla-Safir bound
L. Lavoura
I provide a simple derivation of the Buchalla-Safir bound on gamma. I generalize it to the case where an upper bound on the phase of the penguin pollution is assumed. I apply the B…
Bounds on gamma from CP violation measurements in B -> pi+ pi- and B -> psi K_S
F. J. Botella, Joao P. Silva
We study the determination of gamma from CP-violating observables in B -> pi+ pi- and B -> psi K_S. This determination requires theoretical input to one combination of hadronic par…