Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kreslo, Igor; Pistillo, Ciro; Tufanli, Serhan; Vuilleumier, Jean-Luc (2015). Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment. Physical review letters, 115(12), p. 121802. American Physical Society 10.1103/PhysRevLett.115.121802

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The OPERA experiment was designed to search for νµ → ντ oscillations in appearance mode, i.e. by detecting the τ leptons produced in charged current ντ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the νµ → ντ appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ντ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of νµ → ντ oscillations in appearance mode with a significance larger than 5 σ.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kreslo, Igor; Pistillo, Ciro; Tufanli, Serhan and Vuilleumier, Jean-Luc

Subjects:

500 Science > 530 Physics

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Ciro Pistillo

Date Deposited:

22 Jun 2016 13:56

Last Modified:

22 Jun 2016 13:56

Publisher DOI:

10.1103/PhysRevLett.115.121802

BORIS DOI:

10.7892/boris.82765

URI:

https://boris.unibe.ch/id/eprint/82765

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