{"id":21028,"date":"2018-03-09T09:10:37","date_gmt":"2018-03-09T09:10:37","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/measurement-of-the-w-mass-from-the-ww-to-4q-channel-with-the-aleph-detector\/"},"modified":"2018-03-09T09:10:37","modified_gmt":"2018-03-09T09:10:37","slug":"measurement-of-the-w-mass-from-the-ww-to-4q-channel-with-the-aleph-detector","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/measurement-of-the-w-mass-from-the-ww-to-4q-channel-with-the-aleph-detector\/","title":{"rendered":"Measurement of the w mass from the ww to 4q channel with the aleph detector"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Hugo Ruiz P\u00e9rez <\/strong><\/h2>\n<p>El programa lep2 (1996-2000) del acelerador lep del cern ha ofrecido las mejores condiciones hasta el momento para el estudio de las propiedades del bos\u00f3n w. Las medidas de la anchura, los acoplamientos y la masa de esta part\u00edcula permiten la validaci\u00f3n experimental del modelo est\u00e1ndar de las interacciones electro-d\u00e9biles, as\u00ed como la medida indirecta de la masa del bos\u00f3n de higgs, a\u00fan no descubierto experimentalmente.  los bosones w se produc\u00edan en lep2 a trav\u00e9s de sucesos e+e- -&gt; w+w, de los que se registraron 40.000 entre los cuatro experimentos. La medida de la masa se realiza a trav\u00e9s de la reconstrucci\u00f3n de los productos de desintegraci\u00f3n de cada w. En esta reconstrucci\u00f3n de los productos de desintegraci\u00f3n de cada w. En esta reconstrucci\u00f3n juega un papel importante el hecho de que en las colisiones e+e- la energ\u00eda y el momento en el centro de masas se conocen con gran precisi\u00f3n.  en el an\u00e1lisis que se presenta en esta tesis consiste en la medida de la masa del bos\u00f3n w a trav\u00e9s del canal hadr\u00f3nico, es decir, utilizando aquellos sucesos en que las dos ws decaen en dos jets. Este canal, que representa el 46% de los sucesos, presenta la ventaja sobre el resto de que no hay neutrinos en el estado final y por tanto la reconstrucci\u00f3n cinem\u00e1tica completa de los sucesos es posible. Por el contrario, presenta la complicaci\u00f3n adicional de que las m\u00faltiples part\u00edculas del estado final deben ser asociadas a la w correcta.  una vez obtenida la distribuci\u00f3n de masa invariantes para los sucesos identificados como w+w- com decaimientos hadr\u00f3nicos, esta distribuci\u00f3n es ajustada a las obtenidas de muestras de mc generadas bajo diferentes hip\u00f3tesis de masa de la w. De este ajuste se obtiene la medida de la masa.  cualquier discrepancia entre los sucesos reales y los de mc utilizados para el ajuste representa una fuente de incertidumbre sistem\u00e1tica en la medida. Una categor\u00eda de incertidumbres genuina del canal had<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Measurement of the w mass from the ww to 4q channel with the aleph detector<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Measurement of the w mass from the ww to 4q channel with the aleph detector <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Hugo Ruiz P\u00e9rez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/12\/2002<\/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>Frederic Teubert<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: manuel Mart\u00ednez rodr\u00edguez <\/li>\n<li>roberto Tenchini (vocal)<\/li>\n<li>matteo Cavalli-sforza (vocal)<\/li>\n<li>Juan Alcaraz (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Hugo Ruiz P\u00e9rez El programa lep2 (1996-2000) del acelerador lep del cern ha ofrecido las mejores condiciones [&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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