Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

10); (10) University of Colorado at Boulder; (11) Colorado State University; (12) Dongshin University; (13) Duke University; (14) Ecole Polytechnique IN2P3-CNRS; (15) ETH Zurich; (16) University of Geneva; (17) H. Niewodniczanski Institute of Nuclear Physics PAN; (18) High Energy Accelerator Research Organization (KEK)

arxiv: 1106.2822 · v2 · pith:E72XZQXXnew · submitted 2011-06-14 · ✦ hep-ex

Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

T2K Collaboration: K.Abe (49) , N.Abgrall (16) , Y.Ajima (18) , H.Aihara (48) , J.B.Albert (13) , C.Andreopoulos (47) , B.Andrieu (37) , S.Aoki (27)

show 476 more authors

O.Araoka (18) J.Argyriades (16) A.Ariga (3) T.Ariga (3) S.Assylbekov (11) D.Autiero (32) A.Badertscher (15) M.Barbi (40) G.J.Barker (56) G.Barr (36) M.Bass (11) F.Bay (3) S.Bentham (29) V.Berardi (22) B.E.Berger (11) I.Bertram (29) M.Besnier (14) J.Beucher (8) D.Beznosko (34) S.Bhadra (59) F.d.M.Blaszczyk (8) A.Blondel (16) C.Bojechko (53) J.Bouchez (8 deceased) S.B.Boyd (56) A.Bravar (16) C.Bronner (14) D.G.Brook-Roberge (5) N.Buchanan (11) H.Budd (41) D.Calvet (8) S.L.Cartwright (44) A.Carver (56) R.Castillo (19) M.G.Catanesi (22) A.Cazes (32) A.Cervera (20) C.Chavez (30) S.Choi (43) G.Christodoulou (30) J.Coleman (30) W.Coleman (31) G.Collazuol (24) K.Connolly (57) A.Curioni (15) A.Dabrowska (17) I.Danko (38) R.Das (11) G.S.Davies (29) S.Davis (57) M.Day (41) G.DeRosa (23) J.P.A.M.de Andre (14) P.dePerio (51) A.Delbart (8) C.Densham (47) F.DiLodovico (39) S.DiLuise (15) P.Dinh Tran (14) J.Dobson (21) U.Dore (25) O.Drapier (14) F.Dufour (16) J.Dumarchez (37) S.Dytman (38) M.Dziewiecki (55) M.Dziomba (57) S.Emery (8) A.Ereditato (3) L.Escudero (20) L.S.Esposito (15) M.Fechner (13 8) A.Ferrero (16) A.J.Finch (29) E.Frank (3) Y.Fujii (18) Y.Fukuda (33) V.Galymov (59) F.C.Gannaway (39) A.Gaudin (53) A.Gendotti (15) M.George (39) S.Giffin (40) C.Giganti (19) K.Gilje (34) T.Golan (58) M.Goldhaber (6 J.J.Gomez-Cadenas (20) M.Gonin (14) N.Grant (29) A.Grant (46) P.Gumplinger (52) P.Guzowski (21) A.Haesler (16) M.D.Haigh (36) K.Hamano (52) C.Hansen (20) D.Hansen (38) T.Hara (27) P.F.Harrison (56) B.Hartfiel (31) M.Hartz (59 51) T.Haruyama (18) T.Hasegawa (18) N.C.Hastings (40) S.Hastings (5) A.Hatzikoutelis (29) K.Hayashi (18) Y.Hayato (49) C.Hearty (5) R.L.Helmer (52) R.Henderson (52) N.Higashi (18) J.Hignight (34) E.Hirose (18) J.Holeczek (45) S.Horikawa (15) A.Hyndman (39) A.K.Ichikawa (28) K.Ieki (28) M.Ieva (19) M.Iida (18) M.Ikeda (28) J.Ilic (47) J.Imber (34) T.Ishida (18) C.Ishihara (50) T.Ishii (18) S.J.Ives (21) M.Iwasaki (48) K.Iyogi (49) A.Izmaylov (26) B.Jamieson (5) R.A.Johnson (10) K.K.Joo (9) G.V.Jover-Manas (19) C.K.Jung (34) H.Kaji (50) T.Kajita (50) H.Kakuno (48) J.Kameda (49) K.Kaneyuki (50 D.Karlen (53 52) K.Kasami (18) I.Kato (52) E.Kearns (4) M.Khabibullin (26) F.Khanam (11) A.Khotjantsev (26) D.Kielczewska (54) T.Kikawa (28) J.Kim (5) J.Y.Kim (9) S.B.Kim (43) N.Kimura (18) B.Kirby (5) J.Kisiel (45) P.Kitching (1) T.Kobayashi (18) G.Kogan (21) S.Koike (18) A.Konaka (52) L.L.Kormos (29) A.Korzenev (16) K.Koseki (18) Y.Koshio (49) Y.Kouzuma (49) K.Kowalik (2) V.Kravtsov (11) I.Kreslo (3) W.Kropp (7) H.Kubo (28) Y.Kudenko (26) N.Kulkarni (31) R.Kurjata (55) T.Kutter (31) J.Lagoda (2) K.Laihem (42) M.Laveder (24) K.P.Lee (50) P.T.Le (34) J.M.Levy (37) C.Licciardi (40) I.T.Lim (9) T.Lindner (5) R.P.Litchfield (56 28) M.Litos (4) A.Longhin (8) G.D.Lopez (34) P.F.Loverre (25) L.Ludovici (25) T.Lux (19) M.Macaire (8) K.Mahn (52) Y.Makida (18) M.Malek (21) S.Manly (41) A.Marchionni (15) A.D.Marino (10) J.Marteau (32) J.F.Martin (51) T.Maruyama (18) T.Maryon (29) J.Marzec (55) P.Masliah (21) E.L.Mathie (40) C.Matsumura (35) K.Matsuoka (28) V.Matveev (26) K.Mavrokoridis (30) E.Mazzucato (8) N.McCauley (30) K.S.McFarland (41) C.McGrew (34) T.McLachlan (50) M.Messina (3) W.Metcalf (31) C.Metelko (47) M.Mezzetto (24) P.Mijakowski (2) C.A.Miller (52) A.Minamino (28) O.Mineev (26) S.Mine (7) A.D.Missert (10) G.Mituka (50) M.Miura (49) K.Mizouchi (52) L.Monfregola (20) F.Moreau (14) B.Morgan (56) S.Moriyama (49) A.Muir (46) A.Murakami (28) M.Murdoch (30) S.Murphy (16) J.Myslik (53) T.Nakadaira (18) M.Nakahata (49) T.Nakai (35) K.Nakajima (35) T.Nakamoto (18) K.Nakamura (18) S.Nakayama (49) T.Nakaya (28) D.Naples (38) M.L.Navin (44) B.Nelson (34) T.C.Nicholls (47) K.Nishikawa (18) H.Nishino (50) J.A.Nowak (31) M. Noy (21) Y.Obayashi (49) T.Ogitsu (18) H.Ohhata (18) T.Okamura (18) K.Okumura (50) T.Okusawa (35) S.M.Oser (5) M.Otani (28) R.A.Owen (39) Y.Oyama (18) T.Ozaki (35) M.Y.Pac (12) V.Palladino (23) V.Paolone (38) P.Paul (34) D.Payne (30) G.F.Pearce (47) J.D.Perkin (44) V.Pettinacci (15) F.Pierre (8 E.Poplawska (39) B.Popov (37) M.Posiadala (54) J.-M.Poutissou (52) R.Poutissou (52) P.Przewlocki (2) W. Qian (47) J.L.Raaf (4) E.Radicioni (22) P.N.Ratoff (29) T.M.Raufer (47) M.Ravonel (16) M.Raymond (21) F.Retiere (52) A.Robert (37) P.A.Rodrigues (41) E.Rondio (2) J.M.Roney (53) B.Rossi (3) S.Roth (42) A.Rubbia (15) D.Ruterbories (11) S.Sabouri (5) R.Sacco (39) K.Sakashita (18) F.Sanchez (19) A.Sarrat (8) K.Sasaki (18) K.Scholberg (13) J.Schwehr (11) M.Scott (21) D.I.Scully (56) Y.Seiya (35) T.Sekiguchi (18) H.Sekiya (49) M.Shibata (18) Y.Shimizu (50) M.Shiozawa (49) S.Short (21) M. Syiad (47) R.J.Smith (36) M.Smy (7) J.T.Sobczyk (58) H.Sobel (7) M.Sorel (20) A.Stahl (42) P.Stamoulis (20) J.Steinmann (42) B.Still (39) J.Stone (4) C.Strabel (15) L.R.Sulak (4) R.Sulej (2) P. Sutcliffe (30) A.Suzuki (27) K.Suzuki (28) S.Suzuki (18) S.Y.Suzuki (18) Y.Suzuki (18) Y.Suzuki (49) T.Szeglowski (45) M.Szeptycka (2) R.Tacik (40 M.Tada (18) S.Takahashi (28) A.Takeda (49) Y.Takenaga (49) Y.Takeuchi (27) K.Tanaka (18) H.A.Tanaka (5) M.Tanaka (18) M.M.Tanaka (18) N.Tanimoto (50) K.Tashiro (35) I.Taylor (34) A.Terashima (18) D.Terhorst (42) R.Terri (39) L.F.Thompson (44) A.Thorley (30) W.Toki (11) T.Tomaru (18) Y.Totsuka (18 C.Touramanis (30) T.Tsukamoto (18) M.Tzanov (31 10) Y.Uchida (21) K.Ueno (49) A.Vacheret (21) M.Vagins (7) G.Vasseur (8) T.Wachala (17) J.J.Walding (21) A.V.Waldron (36) C.W.Walter (13) P.J.Wanderer (6) J.Wang (48) M.A.Ward (44) G.P.Ward (44) D.Wark (47 21) M.O.Wascko (21) A.Weber (36 47) R.Wendell (13) N.West (36) L.H.Whitehead (56) G.Wikstrom (16) R.J.Wilkes (57) M.J.Wilking (52) J.R.Wilson (39) R.J.Wilson (11) T.Wongjirad (13) S.Yamada (49) Y.Yamada (18) A.Yamamoto (18) K.Yamamoto (35) Y.Yamanoi (18) H.Yamaoka (18) C.Yanagisawa (34) T.Yano (27) S.Yen (52) N.Yershov (26) M.Yokoyama (48) A.Zalewska (17) J.Zalipska (5) L.Zambelli (37) K.Zaremba (55) M.Ziembicki (55) E.D.Zimmerman (10) M.Zito (8) J.Zmuda (58) ((1) University of Alberta (2) The Andrzej Soltan Institute for Nuclear Studies (3) University of Bern (4) Boston University (5) University of British Columbia (6) Brookhaven National Laboratory (7) University of California (8) IRFU CEA Saclay (9) Chonnam National University (10) University of Colorado at Boulder (11) Colorado State University (12) Dongshin University (13) Duke University (14) Ecole Polytechnique IN2P3-CNRS (15) ETH Zurich (16) University of Geneva (17) H. Niewodniczanski Institute of Nuclear Physics PAN (18) High Energy Accelerator Research Organization (KEK) (19) Institut de Fisica d'Altes Energies (IFAE) (20) IFIC (CSIC University of Valencia) (21) Imperial College London (22) INFN Sezione di Bari Universita` e Politecnico di Bari (23) INFN Sezione di Napoli Universita` di Napoli (24) INFN Sezione di Padova Universit`a di Padova (25) INFN Sezione di Roma Universit`a di Roma "La Sapienza" (26) Institute for Nuclear Research of the Russian Academy of Sciences (27) Kobe University (28) Kyoto University (29) Lancaster University (30) University of Liverpool (31) Louisiana State University (32) Universite de Lyon (33) Miyagi University of Education (34) State University of New York at Stony Brook (35) Osaka City University Department of Physics (36) Oxford University (37) UPMC Universite Paris Diderot (LPNHE) (38) University of Pittsburgh (39) Queen Mary University of London (40) University of Regina (41) University of Rochester (42) RWTH Aachen University (43) Seoul National University (44) University of Sheffield (45) University of Silesia (46) STFC Daresbury Laboratory (47) STFC Rutherford Appleton Laboratory (48) University of Tokyo (49) University of Tokyo (Institute for Cosmic Ray Research) (50) University of Tokyo (Research Center for Cosmic Neutrinos) (51) University of Toronto (52) TRIUMF (53) University of Victoria (54) University of Warsaw (55) Warsaw University of Technology (56) University of Warwick (57) University of Washington (58) Wroclaw University (59) York University)

This is my paper

classification ✦ hep-ex

keywords eventsneutrinothetatimes10appearancedatadeltaaccelerator-produced

0 comments

read the original abstract

The T2K experiment observes indications of $\nu_\mu\rightarrow \nu_e$ appearance in data accumulated with $1.43\times10^{20}$ protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with $|\Delta m_{23}^2|=2.4\times10^{-3}$ eV$^2$, $\sin^2 2\theta_{23}=1$ and $\sin^2 2\theta_{13}=0$, the expected number of such events is 1.5$\pm$0.3(syst.). Under this hypothesis, the probability to observe six or more candidate events is 7$\times10^{-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 $\delta_{\rm CP}=0$ and a normal (inverted) hierarchy.

This paper has not been read by Pith yet.

discussion (0)

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Comparisons of triple-differential cross sections for quasielastic-like $\nu_\mu$-hydrocarbon interactions using $\langle E_\nu\rangle \sim$ 3~GeV versus $\sim$ 6~GeV beams in MINERvA
hep-ex 2026-05 unverdicted novelty 5.0

MINERvA compares quasielastic-like cross sections at two neutrino beam energies and finds discrepancies pointing to overestimated final state interactions for protons and pions.
Equal Majorana Phases from a Minimal and Predictive Neutrino Texture
hep-ph 2023-03 unverdicted novelty 5.0

A new minimal neutrino mass matrix texture is introduced that enforces equal Majorana phases within a partial TBM scheme and is realized via hybrid Type-I and Type-II seesaw under an extended discrete symmetry.
Lepton interactions from GeV to EeV
hep-ph 2026-06 unverdicted novelty 3.0

Phenomenological study predicting incomplete tau polarization at FASER2, observable neutrino and muon trident processes, and contributions to hadron structure from IceCube neutrino events.