Mario Gomez

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This paper describes MELISA-MEdical Literature Search Agent – a prototype of an ontology-based information retrieval agent. We have designed a modular system that can be easily adapted to another medical literature sources or other professional domains. The major issues are the design of an architecture with three levels of abstraction, the use of separated(More)
An improved analysis of b → s+γ decay is given taking into account additional contributions in the supersymmetric sector which enter in the next-to-leading-order (NLO) and are enhanced by tan β factors. Specifically, we compute a set of twenty one-loop diagrams to give the most complete analysis to date of the NLO supersymmetric corrections. These(More)
We compute the neutralino-nucleon cross section in several supersymmetric scenarios, taking into account all kind of constraints. In particular, the constraints that the absence of dangerous charge and colour breaking minima imposes on the parameter space are studied in detail. In addition, the most recent experimental constraints, such as the lower bound(More)
An analysis of the sensitivity of supersymmetric dark matter to variations in the b quark mass is given. Specifically we study the effects on the neutralino relic abundance from supersymmetric loop corrections to the mass of the b quark. It is known that these loop corrections can become significant for large tan β. The analysis is carried out in the(More)
We construct concrete supersymmetric grand unified theories based on the Pati-Salam gauge group SU (4) c × SU (2) L × SU (2) R which naturally lead to a moderate violation of 'asymptotic' Yukawa unification and thus can allow an acceptable b-quark mass even with universal boundary conditions. We consider the constrained minimal supersymmetric standard model(More)
The simplest unified extension of the Minimal Supersymmetric Standard Model with bi-linear R–parity violation naturally predicts a hierarchical neutrino mass spectrum, suitable to explain atmospheric and solar neutrino fluxes. We study whether the individual violation of the lepton numbers L e,µ,τ in the charged sector can lead to measurable rates for BR(µ(More)
The cosmological relic density of the lightest supersymmetric particle of the minimal supersymmetric standard model is calculated under the assumption of gauge and Yukawa coupling unification. We employ radia-tive electroweak breaking with universal boundary conditions from gravity-mediated supersymmetry breaking. Coannihilation of the lightest(More)