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- Instituto Superior TécnicoPT44 papers
- Centre National de la Recherche ScientifiqueFR35 papers
- Instituto Politécnico de LisboaPT33 papers
- Institute of Astrophysics and Space SciencesPT25 papers
- Universidade Nova de LisboaPT15 papers
- European Southern ObservatoryCL13 papers
- University of ÉvoraPT13 papers
- University of Hong KongHK13 papers
- University of PortsmouthGB13 papers
- Instituto de Engenharia de Sistemas e Computadores Investigação e DesenvolvimentoPT11 papers
- European Organization for Nuclear ResearchCH10 papers
- Observatoire Cantonal de NeuchâtelCH10 papers
37 papers · 1 filter
Abelian symmetries in the two-Higgs-doublet model with fermions
P. M. Ferreira, Joao P. Silva
We classify all possible implementations of an abelian symmetry in the two-Higgs-doublet model with fermions. We identify those symmetries which are consistent with non-vanishing q…
Baryogenesis in Cosmological Model with Superstring-Inspired E_6 Unification
C. R. Das, L. V. Laperashvili, H. B. Nielsen +1
We have developed a concept of parallel existence of the ordinary (O) and hidden (H) worlds with a superstring-inspired E_6 unification, broken at the early stage of the Universe i…
Geometric picture of generalized-CP and Higgs-family transformations in the two-Higgs-doublet model
P. M. Ferreira, Howard E. Haber, M. Maniatis +2
In the two-Higgs-doublet model (THDM), generalized-CP transformations (phi_i--> X_{ij} phi_j^* where X is unitary) and unitary Higgs-family transformations (phi_i--> U_{ij} phi_j)…
Improving LMA predictions with non standard interactions
C. R. Das, Joao Pulido
It has been known for some time that the well established LMA solution to the observed solar neutrino deficit fails to predict a flat energy spectrum for SuperKamiokande as opposed…
Generalized CP Invariance and the Yukawa sector of Two-Higgs Models
P. M. Ferreira, Joao P. Silva
We analyze generalized CP symmetries of two-Higgs doublet models, extending them from the scalar to the fermion sector of the theory. We show that, with a single exception, those s…
Dark matter in minimal supergravity with type-II seesaw
J. N. Esteves, M. Hirsch, S. Kaneko +2
We calculate the relic density of the lightest neutralino in a supersymmetric seesaw type-II (``triplet seesaw'') model with minimal supergravity boundary conditions at the GUT sca…