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12 papers · 1 filter
Phenomenological constraints on a scale-dependent gravitational coupling
Orfeu Bertolami, Juan García-Bellido
We investigate the astrophysical and cosmological implications of the recently proposed idea of a running gravitational coupling on macroscopic scales. We find that when applied to…
CP-Violating Observables in Tagged -- Decays
G. C. Branco, W. Grimus, L. Lavoura
We perform a systematic study of CP-violating observables in \ddbar\ decays. We show that given a final state, which may be a CP eigenstate or not, all the observables can in princ…
-- Crisis and New Physics
Gautam Bhattacharyya, Gustavo C. Branco, Wei-Shu Hou
The experimental values of and are the only data which do not seem to agree with Standard Model predictions. Although it is still premature to draw any definite conclus…
The Three-Dimensional BTZ Black Hole as a Cylindrical System in Four-Dimensional General Relativity
José P. S. Lemos, Vilson T. Zanchin
It is shown how to transform the three dimensional BTZ black hole into a four dimensional cylindrical black hole (i.e., black string) in general relativity. This process is identic…
Rotating Charged Black Strings in General Relativity
José P. S. Lemos, Vilson T. Zanchin
Einstein-Maxwell equations with a cosmological constant are analyzed in a four dimensional stationary spacetime admitting in addition a two dimensional group of spatial isome…
Weak magnetic dipole moments in two-Higgs-doublet models
J. Bernabeu, D. Comelli, L. Lavoura +1
We investigate the effects of the new scalars in a two-Higgs-doublet model on the weak magnetic dipole moments of the fermions at the peak. Proportionality of the Yukawa coupli…