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8 papers · 2 filters
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…
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…
Predicting Vckm with Universal Strength of Yukawa Couplings
G. C. Branco, J. I. Silva-Marcos
We study the question of calculability of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements within the framework of universal strength for Yukawa couplings (USY). We first classi…
New Physics with three-photon events at LEP
M. Baillargeon, F. Boudjema, E. Chopin +1
The effect of the most general \z3gt vertex in the reaction $e^+e^- \ra 3γ$ is studied with a particular attention to LEP searches. We give exact analytical expressions including r…