T2K, Collaboration; Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Frank, Eike; Hierholzer, Martin; Kreslo, Igor; Messina, Marcello; Martti, Nirkko (2013). Evidence of Electron Neutrino Appearance in a Muon Neutrino Beam. Physical review. D - particles, fields, gravitation, and cosmology, 88(3), 032002. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.88.032002
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The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, vertical bar Delta m(32)(2)vertical bar approximate to 2.4 X 10(-3) eV(2). An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3 +/- 0.4(syst) events is expected. The background-only hypothesis is rejected with a p value of 0.0009 (3.1 sigma), and a fit assuming nu(mu) -> nu(e) oscillations with sin (2)2 theta(23) = 1, delta(CP) = 0 and vertical bar Delta m(32)(2)vertical bar = 2.4 X 10(-3) eV(2) yields sin (2)2 theta(13) = 0.088(-0.039)(+0.049)(stat + syst).
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Ariga, Akitaka, Ariga, Tomoko, Ereditato, Antonio, Frank, Eike, Hierholzer, Martin, Kreslo, Igor, Messina, Marcello, Martti, Nirkko |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Andrea Stettler |
Date Deposited: |
11 Sep 2014 08:34 |
Last Modified: |
05 Dec 2022 14:37 |
Publisher DOI: |
10.1103/PhysRevD.88.032002 |
Web of Science ID: |
000322797500004 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.58457 |
URI: |
https://boris.unibe.ch/id/eprint/58457 |
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