{"id":65898,"date":"2008-03-07T00:00:00","date_gmt":"2008-03-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/precision-determination-of-the-s-wave-pipi-isospin-scattering-length-difference-a0-a2-in-the-dirac-experiment\/"},"modified":"2008-03-07T00:00:00","modified_gmt":"2008-03-07T00:00:00","slug":"precision-determination-of-the-s-wave-pipi-isospin-scattering-length-difference-a0-a2-in-the-dirac-experiment","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/precision-determination-of-the-s-wave-pipi-isospin-scattering-length-difference-a0-a2-in-the-dirac-experiment\/","title":{"rendered":"Precision determination of the s-wave pipi isospin scattering length difference |a0-a2| in the dirac experiment"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Antonio Romero Vidal <\/strong><\/h2>\n<p>Utilizando la muestra completa de datos tomados por el experimento dirac durante los a\u00f1os 2001,2002 y 2003, se ha realizado un an\u00e1lisis para encontrar el n\u00famero de pares de piones de carga opueste provenientes de la ionizaci\u00f3n del pionium (\u00e1tomo formado por dos piones). Con este n\u00famero se puede hacer una medida precisa de la probabilidad de ionizaci\u00f3n (del orden de 2% de precisi\u00f3n). Y utilizando esta probabilidad se obtiene un valor para la vida media del pionium y para la diferencia en las longitudes de dispersi\u00f3n de isospin i=0 e i=2 (|a0-a2|). Esta medida supone un fuerte chequeo de las predicciones de la teor\u00eda de perturbaciones chiral (chpt) y de quantum chromodynamics (qcd) a baja energ\u00eda.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Precision determination of the s-wave pipi isospin scattering length difference |a0-a2| in the dirac experiment<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Precision determination of the s-wave pipi isospin scattering length difference |a0-a2| in the dirac experiment <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Antonio Romero Vidal <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 03\/07\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Alfredo Amigo Pombo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: carlo Guaraldo <\/li>\n<li>Jos\u00e9 ram\u00f3n Pel\u00e1ez sagredo (vocal)<\/li>\n<li>Luis Garrido beltran (vocal)<\/li>\n<li>m\u00e1ximo Plo casas\u00fas (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Antonio Romero Vidal Utilizando la muestra completa de datos tomados por el experimento dirac durante los a\u00f1os [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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