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
10 papers · 1 filter
Quark mixing from softly broken symmetries
W. Grimus, L. Lavoura
Quark flavor mixing may originate in the soft breaking of horizontal symmetries. Those symmetries, which in the simplest case are three family U(1) groups, are obeyed only by the d…
Quasi-Black Holes from Extremal Charged Dust
Jose' P. S. Lemos, Erick J. Weinberg
One can construct families of static solutions that can be viewed as interpolating between nonsingular spacetimes and those containing black holes. Although everywhere nonsingular,…
Quantum control in infinite dimensions
Witold Karwowski, R. Vilela Mendes
Accurate control of quantum evolution is an essential requirement for quantum state engineering, laser chemistry, quantum information and quantum computing. Conditions of controlla…
The nonlinear directional coupler. An analytic solution
R. Vilela Mendes
Linear and nonlinear directional couplers are currently used in fiber optics communications. They may also play a role in multiphoton approaches to quantum information processing i…
Leptogenesis in seesaw models with a twofold-degenerate neutrino Dirac mass matrix
W. Grimus, L. Lavoura
We study leptogenesis in two seesaw models where maximal atmospheric neutrino mixing and result from symmetries. Salient features of those models are the existence of…
Maximal atmospheric neutrino mixing and the small ratio of muon to tau mass
W. Grimus, L. Lavoura
We discuss the problem of the small ratio of muon mass to tau mass in a class of seesaw models where maximal atmospheric neutrino mixing is enforced through a -- interchange…
A non-standard CP transformation leading to maximal atmospheric neutrino mixing
W. Grimus, L. Lavoura
We discuss a neutrino mass matrix originally found by Babu, Ma, and Valle (BMV) and show that this mass matrix can be characterized by a simple algebraic relation.…
A discrete symmetry group for maximal atmospheric neutrino mixing
W. Grimus, L. Lavoura
We propose a discrete non-abelian symmetry group which enforces maximal atmospheric neutrino mixing, while and the solar mixing angle remains undetermined; wi…
Reconciling the Light Scalar Mesons with Breit-Wigner Resonances as well as the Quark Model
Eef van Beveren, George Rupp
Resonances appearing in hadronic scattering processes are described by a two-phase model. In the one phase, scattering products are observed, whereas the other phase describes conf…
General formulae for f1 --> f2 gamma
L. Lavoura
At one-loop level the decay f1 --> f2 gamma, where f1 and f2 are two spin-1/2 particles with the same electric charge, is mediated by a boson B and a spin-1/2 fermion F. The boson…