Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam

Abe, K. and Bentham, S. and Bertram, I. and Finch, Alexander and Grant, N. and Hatzikoutelis, A. and Maryon, T. and Kormos, Laura (2011) Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam. Physical review letters, 107 (4): 041801. ISSN 1079-7114

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Abstract

The T2K experiment observes indications of nu(mu) -> nu(mu) e appearance in data accumulated with 1.43 x 10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Delta m(23)(2)| = 2.4 x 10(-3) eV(2), sin(2)2 theta(23) = 1 and sin(2)2 theta(13) = 0, the expected number of such events is 1.5 +/- 0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7 x 10(-3), equivalent to 2.5 sigma significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2 theta(13) < 0.28(0.34) for delta(CP) = 0 and a normal (inverted) hierarchy.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2011 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/core/keywords/physics
Subjects:
?? oscillationsphysicsphysics and astronomy(all) ??
ID Code:
52340
Deposited By:
Deposited On:
20 Jan 2012 14:50
Refereed?:
Yes
Published?:
Published
Last Modified:
31 Dec 2023 00:23