Observation of Electron Neutrino Appearance in a Muon Neutrino Beam

Abe, K.; Adam, J.; Aihara, H.; Akiri, T.; Andreopoulos, C.; Aoki, S.; Ariga, Akitaka; Ariga, Tomoko; Assylbekov, S.; Autiero, D.; Barbi, M.; Barker, G. J.; Barr, G.; Bass, M.; Batkiewicz, M.; Bay, F.; Bentham, S. W.; Berardi, V.; Berger, B. E.; Berkman, S.; ... (2013). Observation of Electron Neutrino Appearance in a Muon Neutrino Beam. Physical review letters, 112(6), 061802. American Physical Society 10.1103/PhysRevLett.112.061802

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The T2K experiment has observed electron neutrino appearance in a muon neutrino beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV. A total of 28 electron neutrino events were detected with an energy distribution consistent with an appearance signal, corresponding to a significance of 7.3σ when compared to 4.92 ± 0.55 expected background events. In the PMNS mixing model, the electron neutrino appearance signal depends on several parameters including three mixing angles θ12, θ23, θ13, a mass difference Δm232 and a CP violating phase δCP. In this neutrino oscillation scenario, assuming |Δm232|=2.4×10−3 eV2, sin2θ23=0.5, δCP=0, and Δm232>0 (Δm232<0), a best-fit value of sin22θ13 = 0.140+0.038−0.032 (0.170+0.045−0.037) is obtained.

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; Göldi, Damian; Hierholzer, Martin; Kreslo, Igor; Martti, Nirkko; Pistillo, Ciro and Redij, Asmita Ajit

Subjects:

500 Science > 530 Physics

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Elena Kirillova

Date Deposited:

25 Sep 2014 11:52

Last Modified:

20 Jan 2016 11:35

Publisher DOI:

10.1103/PhysRevLett.112.061802

Web of Science ID:

000331951000003

ArXiv ID:

1311.4750v1

BORIS DOI:

10.7892/boris.49183

URI:

https://boris.unibe.ch/id/eprint/49183

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