Abstract

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).

Autore Pugliese

• Berardi Vincenzo

Tutti gli autori

• Abe K , Abgrall N , Aihara H , Akiri T , Albert J B , Andreopoulos C , Aoki S , Ariga A , Ariga T , 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 , Bertram I , Beznosko D , Bhadra S , Blaszczyk F D M , Blondel A , Bojechko C , Boyd S , Brailsford D , Bravar A , Bronner C , Brook-Roberge D G , Buchanan N , Calland R G , Rodriguez J Caravaca , Cartwright S L , Castillo R , Catanesi M G , Cervera A , Cherdack D , Christodoulou G , Clifton A , Coleman J , Coleman S J , Collazuol G , Connolly K , Cremonesi L , Curioni A , Dabrowska A , Danko I , Das R , Davis S , Day M , de Andre J P A M , de Perio P , De Rosa G , Dealtry T 45 , Dennis S 54 , Densham C , Di Lodovico F , Di Luise S , Dobson J , Drapier O , Duboyski T , Dufour F , Dumarchez J , Dytman S , Dziewiecki M , Dziomba M , Emery S , Ereditato A , Escudero L , Finch A J , Frank E , Friend M , Fujii Y , Fukuda Y , Furmanski A , Galymov V , Gaudin A , Giffin S , Giganti C , Gilje K , Golan T , Gomez-Cadenas J J , Gonin M , Grant N , Gudin D , Hadley D R , Haesler A , Haigh M D , Hamilton P , Hansen D , Hara T , Hartz M 58 , Hasegawa T , Hastings N C , Hayato Y , Hearty C , Helmer R L , Hierholzer M , Hignight J , Hillairet A , Himmel A , Hiraki T , Hirota S , Holeczek J , Horikawa S , Huang K , Ichikawa A K , Ieki K , Ieva M , Ikeda M , Imber J , Insler J , Irvine T J , Ishida T , Ishii T , Ives S J , Iyogi K , Izmaylov A 24 , Jacob A , Jamieson B , Johnson R A , Jo J H , Jonsson P , Joo K K , Jung C K , Kaboth A , Kaji H , Kajita T , Kakuno H , Kameda J , Kanazawa Y , Karlen D 51 , Karpikov I , Kearns E , Khabibullin M , Khanam F , Khotjantsev A , Kielczewska D , Kikawa T , Kilinski A , Kim J Y , Kim J , Kim S B , Kirby B , Kisiel J , Kitching P , Kobayashi T , Kogan G , Kolaceke A , Konaka A , Kormos L L , Korzenev A , Koseki K , Koshio Y , Kowalik K , Kreslo I , Kropp W , Kubo H , Kudenko Y , Kumaratunga S , Kurjata R , Kutter T , Lagoda J , Laihem K , Laing A , Laveder M , Lawe M , Lazos M , Lee K P , Licciardi C , Lim I T , Lindner T , Lister C , Litchfield R P 54 , Longhin A , Lopez G D , Ludovici L , Macaire M , Magaletti L , Mahn K , Malek M , Manly S , Marchionni A , Marino A D , Marteau J , Martin J F , Maruyama T , Marzec J , Masliah P , Mathie E L , Matveev V , Mavrokoridis K , Mazzucato E , McCauley N , McFarland K S , McGrew C , McLachlan T , Messina M , Metelko C , Mezzetto M , Mijakowski P , Miller C A , Minamino A , Mineev O , Mine S , Missert A , Miura M , Monfregola L , Moriyama S , Mueller Th A , Murakami A , Murdoch M , Murphy S 13 , Myslik J , Nagasaki T , Nakadaira T , Nakahata M , Nakai T , Nakajima K , Nakamura K , Nakayama S , Nakaya T , Nakayoshi K , Naples D , Nicholls T C , Nielsen C , Nirkko M , Nishikawa K , Nishimura Y , O'Keeffe H M , Obayashi Y , Ohta R , Okumura K , Okusawa T , Oryszczak W , Oser S M , Otani M , Owen R A , Oyama Y , Pac M Y , Palladino V , Paolone V , Payne D , Pearce G F , Perevozchikov O , Perkin J D , Petrov Y , Guerra E S Pinzon , Plonski P , Poplawska E , Popov B , Posiadala M , Poutissou J -M , Poutissou R , Przewlocki P , Quilain B , Radicioni E , Ratoff P N , Ravonel M , Rayner M A M , Reeves M , Reinherz-Aronis E , Retiere F , Robert A , Rodrigues P A , Rondio E , Roth S , Rubbia A , Ruterbories D , Sacco R , Sakashita K , Sanchez F , Scantamburlo E , Scholberg K , Schwehr J , Scott M , Scully D I , Seiya Y , Sekiguchi T , Sekiya H , Sgalaberna D , Shibata M , Shiozawa M , Short S , Shustrov Y , Sinclair P , Smith B , Smith R J , Smy M , Sobczyk J T , Sobel H , Sorel M , Southwell L , Stamoulis P , Steinmann J , Still B , Suzuki A , Suzuki K , Suzuki S Y , Suzuki Y , Szeglowski T , Szeptycka M , Tacik R 39 , Tada M , Takahashi S , Takeda A , Takeuchi Y , Tanaka H A , Tanaka M M , Tanaka M , Taylor I J , Terhorst D , Terri R , Thompson L F , Thorley A , Tobayama S , Toki W , Tomura T , Totsuka Y , Touramanis C , Tsukamoto T , Tzanov M , Uchida Y , Ueno K , Vacheret A , Vagins M , Vasseur G , Wachala T , Waldron A V , Walter C W , Wark D 45 , Wascko M O , Weber A 45 , Wendell R , Wilkes R J , Wilking M J , Wilkinson C , Williamson Z , Wilson J R , Wilson R J , Wongjirad T , Yamada Y , Yamamoto K , Yanagisawa C , Yen S , Yershov N , Yokoyama M , Yuan T , Zalewska A , Zambel

Titolo volume/Rivista

PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY

Anno di pubblicazione

2013

ISSN

1550-7998

ISBN

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Numero di citazioni Wos

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Settori ERC

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Codici ASJC

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