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4-8 August 2015
America/Detroit timezone

Results from the OPERA experiment at the CNGS beam

7 Aug 2015, 14:00
18m
Hussey (Michigan League)

Hussey

Michigan League

Neutrino Experiment Neutrino Physics

Speaker

Dr Tomohiro Hayakawa (Nagoya University)

Description

The OPERA experiment at the Gran Sasso underground laboratory has been designed to study the $\nu_\mu \to \nu_\tau$ oscillation in appearance mode in the CNGS neutrino beam. Four $\nu_\tau$ candidate events have been confirmed so far, using a sub-sample of data from the 2008-2012 runs. Given the number of analysed events and the low background, $\nu_\mu \to \nu_\tau$ oscillations have been established with a significance of 4.2 sigma. In the talk we will present results based on an increased sample of scanned emulsion target units (bricks). The $\nu_\tau$ data analysis will be updated and discussed, with emphasis on the background constraints obtained by using dedicated data-driven control samples. The analysis of the present tau neutrino and electron neutrino samples in the framework of the 3+1 sterile model will be presented.
Oral or Poster Presentation Oral

Primary author

Dr Tomohiro Hayakawa (Nagoya University)

Co-author

Prof. Koichi Kodama (Aichi University of Education)

Presentation Materials