Hints of new physics in bottomonium decays and spectroscopy

A non-standard light CP-odd Higgs boson could induce a slight (but observable) lepton universality breakdown in Upsilon leptonic decays. Moreover, the mixing between such a pseudoscalar Higgs and ηb states might shift the mass levels of the latter, thereby changing the values of the mΥ(nS)−mηb(nS) splittings predicted in the standard model. Besides, also the ηb width could be broader than expected, with potentially negative consequences for its discovery in both e+e− and hadron colliders

Prospects of searching for (un)particles from Hidden Sectors using rapidity correlations in multiparticle production at the LHC

Most signatures of new physics have been studied on the transverse plane with respect to the beam direction at the LHC where background is much reduced. In this paper we propose the analysis of inclusive longitudinal (pseudo)rapidity correlations among final-state (charged) particles in order to search for (un)particles belonging to a Hidden Sector beyond the Standard Model, using a selected sample of p-p minimum bias events (applying appropriate off-line cuts on events based on, e.g., minijets, high-multiplicity, event shape variables, high-pT leptons and photons, etc) collected at the early running of the LHC. To this aim, we examine inclusive and semi-inclusive two-particle correlation functions, forward-backward correlations, and factorial moments of the multiplicity distribution, without resorting to any particular model but under very general (though simplifying) assumptions. Finally, motivated by some analysis techniques employed in the search for Quark-Gluon-Plasma in heavy-ion collisions, we investigate the impact of such intermediate (un)particle stuff on the (multi)fractality of parton cascades in p-p collisions, by means of a Levy stable law description and a Ginzburg-Landau model of phase transitions. Results from our preliminary study seem encouraging for possible dedicated analyses at the LHC and Tevatron experiments

A comment on heavy-quark effective fields

Effective fields defined in the heavy-quark effective theory to describe heavy quarks in heavy-light hadrons are examined in some detail in the standard formulation of a quantum field theory

Banda fondo blanco

Este trabajo se inscribe en la modalidad de emprendimiento y en la línea de investigación Arte y Sociedad de la Facultad de Artes ASAB de la Universidad Distrital Francisco José de Caldas porque es un proyecto que incluye procesos de creación y de gestión, y que toca las problemáticas de arte asociadas a las condiciones laborales de los músicos y su reconocimiento en la sociedad. El trabajo surge de la pregunta ¿Cómo lograr estabilidad en el circuito comercial y ofrecer un mejoramiento laboral a los integrantes de una banda de música en el género popular? y busca establecer los elementos claves para crear una banda de música en el género popular que involucre a músicos académicos y empíricos, ofrezca condiciones dignas de trabajo y sea sostenible económicamente.This work is part of the entrepreneurship modality and in the Art and Society line of research of the ASAB Faculty of Arts of the Francisco José de Caldas District University because it is a project that includes creation and management processes, and that touches on the problems of art associated with the working conditions of musicians and their recognition in society. The work arises from the question, How to achieve stability in the commercial circuit and offer a job improvement to the members of a music band in the popular genre? and it seeks to establish the key elements to create a music band in the popular genre that involves academic and empirical musicians, offers decent working conditions and It being economically sustainable.N

Alfredo molano. los años del tropel

Alfredo Molano. Los años del tropel, Bogotá: CINEP-CEREC 1985

Herbert braun. mataron a gaitán

Herbert Braun. Mataron a Gaitán, Bogotá: Ediciones Universidad Nacional, 1987