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
Phenomenological and Cosmological Aspects of a Minimal GUT Scenario
Ilja Dorsner, Pavel Fileviez Perez, Ricardo Gonzalez Felipe
Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied. It is…
Sequential charmonium dissociation
F. Karsch, D. Kharzeev, H. Satz
Finite temperature lattice QCD indicates that the charmonium ground state J/psi can survive in a quark-gluon plasma up to 1.5 T_c or more, while the excited states chi_c and psi-pr…
Charged and neutral pion production in the S-matrix approach
V. Malafaia, M. T. Pena, Ch. Elster +1
The S-matrix approach is used to calculate charged as well as neutral pion production reactions from NN scattering, with the same set of underlying processes and interactions. The…
Leptogenesis, Yukawa Textures and Weak Basis Invariants
Gustavo C. Branco, M. N. Rebelo, J. I. Silva-Marcos
We show that a large class of sets of leptonic texture zeros considered in the literature imply the vanishing of certain CP-odd weak-basis invariants. These invariant conditions en…
Mu-tau antisymmetry and neutrino mass matrices
Walter Grimus, Satoru Kaneko, Luis Lavoura +2
Using the seesaw mechanism and a discrete symmetry, we construct a class of models for the neutrino mass matrix where the inverse of that matrix is the sum of a mu-tau antisymmetri…
Neutrino Mass Matrices with Vanishing Determinant and
Bhag C. Chauhan, Joao Pulido, Marco Picariello
We investigate the prospects for scenarios with vanishing determinant neutrino mass matrices and vanishing mixing angle. Normal and inverse mass hierarchies are considered…
Neutrino Signal Variation in KamLAND
Bhag C. Chauhan
Large Mixing Angle (LMA) neutrino oscillation is the main solution for the long-standing Solar Neutrino Problem (SNP). Whether there is any subdominant effect accompanying the domi…
Measurements of New Physics in B -> pi pi Decays
Seungwon Baek, F. J. Botella, David London +1
If new physics (NP) is present in B -> pi pi decays, it can affect the isospin I=2 or I=0 channels. In this paper, we discuss various methods for detecting and measuring this NP. T…
A model realizing the Harrison-Perkins-Scott lepton mixing matrix
W. Grimus, L. Lavoura
We present a supersymmetric model in which the lepton mixing matrix obeys, at the seesaw scale, the Harrison--Perkins--Scott \textit{Ansatz}--vanishing , maximal atmosp…
Aspects of thermal leptogenesis in braneworld cosmology
M. C. Bento, R. Gonzalez Felipe, N. M. C. Santos
The mechanism of thermal leptogenesis is investigated in the high-energy regime of braneworld cosmology. Within the simplest seesaw framework with hierarchical heavy Majorana neutr…
Neutrinos in Warped Extra Dimensions
G. Moreau, J. I. Silva-Marcos
Amongst the diverse propositions for extra dimensional scenarios, the model of Randall and Sundrum (RS), which offers a solution for the long standing puzzle of the gauge hierarchy…
Enlarging the window for radiative leptogenesis
G. C. Branco, R. Gonzalez Felipe, F. R. Joaquim +1
We investigate the scenario of resonant thermal leptogenesis, in which the leptonic asymmetries are generated through renormalization group corrections induced at the leptogenesis…
Can one detect new physics in I=0 and/or I=2 contributions to the decays B --> pi pi?
Seungwon Baek, F. J. Botella, David London +1
We study the effects of new-physics contributions to B --> pi pi decays, which can be parametrized as four new complex quantities. A simple analysis is provided by utilizing the re…
Minimal string-scale unification of gauge couplings
D. Emmanuel-Costa, R. Gonzalez Felipe
We look for the minimal particle content which is necessary to add to the standard model in order to have a complete unification of gauge couplings and gravity at the weakly couple…
S3 x Z2 model for neutrino mass matrices
W. Grimus, L. Lavoura
We propose a model for lepton mass matrices based on the seesaw mechanism, a complex scalar gauge singlet and a horizontal symmetry $S_3 \times \mathbbm{Z}_2$. In a suitable weak b…
Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology
M. C. Bento, R. Gonzalez Felipe, N. M. C. Santos
The mechanism of gravitational baryogenesis, based on the CPT-violating gravitational interaction between the derivative of the Ricci scalar curvature and the baryon-number current…
Low Energy Solar Neutrinos and Spin Flavour Precession
Bhag C. Chauhan, Joao Pulido, R. S. Raghavan
The possibility that the Gallium data effectively indicates a time modulation of the solar active neutrino flux in possible connection to solar activity is examined on the light of…
Reparametrization invariance of B decay amplitudes and implications for new physics searches in B decays
F. J. Botella, J. P. Silva
When studying B decays within the Standard Model, it is customary to use the unitarity of the CKM matrix in order to write the decay amplitudes in terms of only two of the three we…
Two predictive supersymmetric S3 x Z2 models for the quark mass matrices
Luis Lavoura, Ernest Ma
We propose two simple models for the quark mass matrices which may be implemented through an S3 x Z2 symmetry in a supersymmetric context. Each model has eight parameters and, ther…