Abstract

The T2K experiment has reported the first observation of the appearance of electron neutrinos in a muon neutrino beam. The main and irreducible background to the appearance signal comes from the presence in the neutrino beam of a small intrinsic component of electron neutrinos originating from muon and kaon decays. In T2K, this component is expected to represent 1.2% of the total neutrino flux. A measurement of this component using the near detector (ND280), located 280 m from the target, is presented. The charged current interactions of electron neutrinos are selected by combining the particle identification capabilities of both the time projection chambers and electromagnetic calorimeters of ND280. The measured ratio between the observed electron neutrino beam component and the prediction is 1.01 +/- 0.10 providing a direct confirmation of the neutrino fluxes and neutrino cross section modeling used for T2K neutrino oscillation analyses. Electron neutrinos coming from muons and kaons decay are also separately measured, resulting in a ratio with respect to the prediction of 0.68 +/- 0.30 and 1.10 +/- 0.14, respectively.

Autore Pugliese

• Berardi Vincenzo

Tutti gli autori

• Abe K , Adam J , Aihara H , Akiri T , 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 , Bhadra S , Blaszczyk F d M , Blondel A , Bojechko C , Bordoni S , Boyd S B , Brailsford D , Bravar A , Bronner C , Buchanan N , Calland R G , Caravaca Rodriguez J , 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 , Dabrowska A , Danko I , Das R , Davis S , de Perio P , De Rosa G , Dealtry T , Dennis S R , Densham C , Di Lodovico F , Di Luise S , Drapier O , Duboyski T , Duffy K , Dufour F , Dumarchez J , Dytman S , Dziewiecki M , Emery S , Ereditato A , Escudero L , Finch A J , Floetotto L , Friend M , Fujii Y , Fukuda Y , Furmanski A P , Galymov V , Giffin S , Giganti C , Gilje K , Goeldi D , 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 , 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 , Iwai E , Iyogi K , Izmaylov A , Jacob A , Jamieson B , Johnson R A , Jo J H , Jonsson P , Jung C K , Kabirnezhad M , Kaboth A C , Kajita T , Kakuno H , Kameda J , Kanazawa Y , Karlen D , Karpikov I , Kearns E , Khabibullin M , Khotjantsev A , Kielczewska D , Kikawa T , Kilinski A , Kim J , Kisiel J , Kitching P , Kobayashi T , Koch L , Kolaceke A , Konaka A , Kormos L L , Korzenev A , Koseki K , Koshio Y , Kreslo I , Kropp W , Kubo H , Kudenko Y , Kumaratunga S , Kurjata R , Kutter T , Lagoda J , Laihem K , Lamont I , Larkin E , Laveder M , Lawe M , Lazos M , Lee K P , Lindner T , Lister C , Litchfield R P , Longhin A , Ludovici L , Macaire M , Magaletti L , Mahn K , Malek M , Manly S , Marino A D , Marteau J , Martin J F , Maruyama T , Marzec J , Mathie E L , Matveev V , Mavrokoridis K , Mazzucato E , McCarthy M , McCauley N , McFarland K S , McGrew C , 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 , Myslik J , Nagasaki T , Nakadaira T , Nakahata M , Nakai T , Nakamura K , Nakayama S , Nakaya T , Nakayoshi K , Naples D , Nielsen C , Nirkko M , Nishikawa K , Nishimura Y , O'Keeffe H M , Ohta R , Okumura K , Okusawa T , Oryszczak W , Oser S M , Owen R A , Oyama Y , Palladino V , Palomino J , Paolone V , Payne D , Perevozchikov O , Perkin J D , Petrov Y , Pickard L , Guerra E S Pinzon , Pistillo C , 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 , Redij A , Reeves M , Reinherz-Aronis E , Retiere F , Robert A , Rodrigues P A , Rojas P , Rondio E , Roth S , Rubbia A , Ruterbories D , Sacco R , Sakashita K , Sanchez F , Sato F , Scantamburlo E , Scholberg K , Schoppmann S , Schwehr J , Scott M , Seiya Y , Sekiguchi T , Sekiya H , Sgalaberna D , 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 , Suda Y , Suzuki A , Suzuki K , Suzuki S Y , Suzuki Y , Szeglowski T , Tacik R , Tada M , Takahashi S , Takeda A , Takeuchi Y , Tanaka H K , Tanaka H A , Tanaka M M , 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 , Wascko M O , Weber A , 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 , Yu M , Zalewska A , Zalipska J , Zambelli L , Zaremba K , Ziembicki M , Zimmerman E D , Zito M , Zmuda J

Titolo volume/Rivista

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

Anno di pubblicazione

2014

ISSN

1550-7998

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

9

Ultimo Aggiornamento Citazioni

2017-04-23 03:20:56

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile