3,695 research outputs found

    Estudio y modelamiento por elementos finitos de la interacción acero-concreto de tuberías embebidas en concreto

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    Trabajo de InvestigaciónEl presente trabajo de investigación representa el estudio de la interacción acero y concreto en blindajes hidroeléctricos apoyado en referencias bibliográficas y por medio del software de análisis de elementos finitos Abaqus CAE, en el cual se desarrollaron siguiendo los lineamientos de las normas AWWA C200 y NSR-10 para los datos de resistencia de materiales y presiones hidrostáticas que permitieron la extracción de modelos 2D con resultados asociados a distribución de esfuerzos, deformaciones y presiones de contacto; información con la cual se plateo el análisis del comportamiento1. TÍTULO 2. ALTERNATIVA 3. LÍNEA DE INVESTIGACIÓN 4. INTRODUCCIÓN 5. PLANTEAMIENTO Y FORMULACIÓN DEL PROBLEMA 6. ANTECEDENTES 7. JUSTIFICACIÓN 8. OBJETIVOS 9. ALCANCES Y LIMITACIONES 10. MARCO DE REFERENCIA 11. ESTADO DEL ARTE 12. METODOLOGÍA 13. MODELACIÓN 14. RESULTADOS 15. ANÁLISIS DE RESULTADOSPregradoIngeniero Civi

    The hybrid meson: new results from the updated mg and alpha_s parameters

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    We present new results concerning the masses and the decay widths of the most interesting hybrid meson states taking as inputs the gluon mass mg and the non-perturbative QCD running coupling constant ?alpha_s(0) comming from both LQCD and SDE recent estimations.Comment: 10 pages, 8 table

    Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

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    The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum
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