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arxiv: 1902.06529 · v3 · submitted 2019-02-18 · ✦ hep-ex

Recognition: unknown

Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km

K. Abe , R. Akutsu , A. Ali , C. Andreopoulos , L. Anthony , M. Antonova , S. Aoki , A. Ariga
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Y. Ashida Y. Awataguchi Y. Azuma S. Ban M. Barbi G.J. Barker G. Barr C. Barry M. Batkiewicz-Kwasniak F. Bench V. Berardi S. Berkman R.M. Berner L. Berns S. Bhadra S. Bienstock A. Blondel S. Bolognesi B. Bourguille S.B. Boyd D. Brailsford A. Bravar C. Bronner M. Buizza Avanzini J. Calcutt T. Campbell S. Cao S.L. Cartwright M.G. Catanesi A. Cervera A. Chappell C. Checchia D. Cherdack N. Chikuma G. Christodoulou J. Coleman G. Collazuol D. Coplowe A. Cudd A. Dabrowska G. De Rosa T. Dealtry P.F. Denner S.R. Dennis C. Densham F. Di Lodovico N. Dokania S. Dolan O. Drapier K.E. Duffy J. Dumarchez P. Dunne S. Emery-Schrenk A. Ereditato P. Fernandez T. Feusels A.J. Finch G.A. Fiorentini G. Fiorillo C. Francois M. Friend Y. Fujii R. Fujita D. Fukuda Y. Fukuda K. Gameil C. Giganti F. Gizzarelli T. Golan M. Gonin D.R. Hadley J.T. Haigh P. Hamacher-Baumann M. Hartz T. Hasegawa N.C. Hastings T. Hayashino Y. Hayato A. Hiramoto M. Hogan J. Holeczek N.T. Hong Van F. Hosomi F. Iacob A.K. Ichikawa M. Ikeda T. Inoue R.A. Intonti T. Ishida T. Ishii M. Ishitsuka K. Iwamoto A. Izmaylov B. Jamieson C. Jesus M. Jiang S. Johnson P. Jonsson C.K. Jung M. Kabirnezhad A.C. Kaboth T. Kajita H. Kakuno J. Kameda D. Karlen T. Katori Y. Kato E. Kearns M. Khabibullin A. Khotjantsev H. Kim J. Kim S. King J. Kisiel A. Knight A. Knox T. Kobayashi L. Koch T. Koga A. Konaka L.L. Kormos Y. Koshio K. Kowalik H. Kubo Y. Kudenko R. Kurjata T. Kutter M. Kuze L. Labarga J. Lagoda M. Lamoureux P. Lasorak M. Laveder M. Lawe M. Licciardi T. Lindner R.P. Litchfield X. Li A. Longhin J.P. Lopez T. Lou L. Ludovici X. Lu T. Lux L. Magaletti K. Mahn M. Malek S. Manly L. Maret A.D. Marino J.F. Martin P. Martins T. Maruyama T. Matsubara V. Matveev K. Mavrokoridis W.Y. Ma E. Mazzucato M. McCarthy N. McCauley K.S. McFarland C. McGrew A. Mefodiev C. Metelko M. Mezzetto A. Minamino O. Mineev S. Mine M. Miura L. Molina Bueno S. Moriyama J. Morrison Th.A. Mueller S. Murphy Y. Nagai T. Nakadaira M. Nakahata Y. Nakajima A. Nakamura K.G. Nakamura K. Nakamura K.D. Nakamura Y. Nakanishi S. Nakayama T. Nakaya K. Nakayoshi C. Nantais K. Niewczas K. Nishikawa Y. Nishimura T.S. Nonnenmacher P. Novella J. Nowak H.M. O'Keeffe L. O'Sullivan K. Okumura T. Okusawa S.M. Oser R.A. Owen Y. Oyama V. Palladino J.L. Palomino V. Paolone W.C. Parker P. Paudyal M. Pavin D. Payne L. Pickering C. Pidcott E.S. Pinzon Guerra C. Pistillo B. Popov K. Porwit M. Posiadala-Zezula A. Pritchard B. Quilain T. Radermacher E. Radicioni B. Radics P.N. Ratoff E. Reinherz-Aronis C. Riccio E. Rondio B. Rossi S. Roth A. Rubbia A.C. Ruggeri A. Rychter K. Sakashita F. S\'anchez S. Sasaki C.M. Schloesser K. Scholberg J. Schwehr M. Scott Y. Seiya T. Sekiguchi H. Sekiya D. Sgalaberna R. Shah A. Shaikhiev F. Shaker D. Shaw A. Shaykina M. Shiozawa A. Smirnov M. Smy J.T. Sobczyk H. Sobel Y. Sonoda J. Steinmann T. Stewart P. Stowell S. Suvorov A. Suzuki S.Y. Suzuki Y. Suzuki A.A. Sztuc R. Tacik M. Tada A. Takeda Y. Takeuchi R. Tamura H.K. Tanaka H.A. Tanaka L.F. Thompson W. Toki C. Touramanis K.M. Tsui T. Tsukamoto M. Tzanov Y. Uchida W. Uno M. Vagins Z. Vallari D. Vargas G. Vasseur C. Vilela T. Vladisavljevic V.V. Volkov T. Wachala J. Walker Y. Wang D. Wark M.O. Wascko A. Weber R. Wendell M.J. Wilking C. Wilkinson J.R. Wilson R.J. Wilson C. Wret Y. Yamada K. Yamamoto S. Yamasu C. Yanagisawa G. Yang T. Yano K. Yasutome S. Yen N. Yershov M. Yokoyama T. Yoshida M. Yu A. Zalewska J. Zalipska K. Zaremba G. Zarnecki M. Ziembicki E.D. Zimmerman M. Zito S. Zsoldos A. Zykova
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keywords sterileneutrinobaselinecurrentdetectorlightmixingneutral
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We perform a search for light sterile neutrinos using the data from the T2K far detector at a baseline of 295 km, with an exposure of 14.7 (7.6)$\times 10^{20}$ protons on target in neutrino (antineutrino) mode. A selection of neutral current interaction samples are also used to enhance the sensitivity to sterile mixing. No evidence of sterile neutrino mixing in the 3+1 model was found from a simultaneous fit to the charged-current muon, electron and neutral current neutrino samples. We set the most stringent limit on the sterile oscillation amplitude $\sin^2\theta_{24}$ for the sterile neutrino mass splitting $\Delta m^2_{41}<3\times 10^{-3}$ eV$^2/c^4$.

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