Descubrimiento de la oscilacion de neutrinos en el canal <img width=62 height=12 src="../img/a05_figura05.gif">, resultados finales del experimento opera
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Revista Boliviana de Física
Abstract
El experimento OPERA fue disenado para la observación directa de la oscilación de neutrinos de tipo muónico <img width=27 height=18 src="../img/a05_figura01.gif">en neutrinos de tipo tauónico <img width=26 height=15 src="../img/a05_figura02.gif">, en la modalidad de aparicion, es decir detectando leptónes <img width=10 height=7 src="../img/a05_figura03.gif">producidos en la interaccion a corriente cargada del <img width=15 height=10 src="../img/a05_figura04.gif">. El experimento tomo datos desde el 2008 al 2012 utilizando el haz de neutrinos CERN - Gran Sasso. En este período OPERA detecto cinco eventos candidatos de <img width=15 height=10 src="../img/a05_figura04.gif">considerando el fondo y el numero total de eventos detectados se determinó el descubrimiento de las oscilaciones <img width=62 height=12 src="../img/a05_figura05.gif">en la modalidad de observacion directa, con una significancia mayor a 5<img width=10 height=7 src="../img/a05_figura06.gif">. Este artículo es una adaptacion del reciente anuncio de descubrimiento de la colaboración OPERA (Agafanova et al. 2015); aquí se incluye un mayor enfasis en la descripción del aparato experimental.
The OPERA experiment was designed for the direct observation of neutrino oscillation of the muonic neutrino <img width=27 height=18 src="../img/a05_figura01.gif">into the tauonic neutrino <img width=26 height=15 src="../img/a05_figura02.gif">where <img width=10 height=7 src="../img/a05_figura03.gif">leptóns are produced by the interaction through charged current of <img width=26 height=15 src="../img/a05_figura02.gif">. The experiment recorded data, from 2008 to 2012, using a neutrino beam, CERN - Gran Sasso, during this period OPERA detected 5 event candidates. Considering the background and the total number of detected events the oscillation <img width=62 height=12 src="../img/a05_figura05.gif">was determined directly with a standard deviation of 5<img width=10 height=7 src="../img/a05_figura06.gif">. In this article we give a thorough description of the experimental apparatus and details related to the reported OPERA discovery (Agafanova et al. 2015).
The OPERA experiment was designed for the direct observation of neutrino oscillation of the muonic neutrino <img width=27 height=18 src="../img/a05_figura01.gif">into the tauonic neutrino <img width=26 height=15 src="../img/a05_figura02.gif">where <img width=10 height=7 src="../img/a05_figura03.gif">leptóns are produced by the interaction through charged current of <img width=26 height=15 src="../img/a05_figura02.gif">. The experiment recorded data, from 2008 to 2012, using a neutrino beam, CERN - Gran Sasso, during this period OPERA detected 5 event candidates. Considering the background and the total number of detected events the oscillation <img width=62 height=12 src="../img/a05_figura05.gif">was determined directly with a standard deviation of 5<img width=10 height=7 src="../img/a05_figura06.gif">. In this article we give a thorough description of the experimental apparatus and details related to the reported OPERA discovery (Agafanova et al. 2015).
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Vol. 28, No. 28