Papers by Mario Andrés Ávila
A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two sa... more A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two same-sign charged leptons of the same flavour and two jets. The data correspond to an integrated luminosity of 4.98 fb −1 of pp collisions at a centre-ofmass energy of 7 TeV collected with the CMS detector at the Large Hadron Collider. No excess of events is observed beyond the expected standard model background and therefore upper limits are set on the square of the mixing parameter, |V N | 2 , for = e, µ, as a function of heavy Majorana-neutrino mass. These are the first direct upper limits on the heavy Majorana-neutrino mixing for m N > 90 GeV.
Foreign Affairs, en español, verano de 1993 SAMUEL P. HUNTINGTON es profesor titular de Ciencia d... more Foreign Affairs, en español, verano de 1993 SAMUEL P. HUNTINGTON es profesor titular de Ciencia de Gobierno de la Universidad de Eaton, y director del John M. Olin Institute for Strategic Studies de la Universidad de Harvard. Este artículo es producto del proyecto del Olin Institute relacionado con "Cambios en el entorno de seguridad e intereses nacionales estadounidenses".
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Papers by Mario Andrés Ávila