Evidence of electron neutrino appearance in a muon neutrino beam

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 o...

Descripción completa

Detalles Bibliográficos
Autores: T2K Collaboration, Abe, Kou, Cervera Villanueva, Anselmo, Escudero Sánchez, Lorena, Gómez Cadenas, Juan José, Izmaylov, A., Monfregola, Laura, Sorel, Michel, Stamoulis, Panagiotis
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/126330
Acceso en línea:http://hdl.handle.net/10261/126330
Access Level:acceso abierto
Palabra clave:Absorption cross-sections
Momentum range
ddc:500.2
id ES_60daef4afd068a4d515601c19c894cd0
oai_identifier_str oai:digital.csic.es:10261/126330
network_acronym_str ES
network_name_str España
repository_id_str
spelling Evidence of electron neutrino appearance in a muon neutrino beamT2K CollaborationAbe, KouCervera Villanueva, AnselmoEscudero Sánchez, LorenaGómez Cadenas, Juan JoséIzmaylov, A.Monfregola, LauraSorel, MichelStamoulis, PanagiotisAbsorption cross-sectionsMomentum rangeddc:500.2The 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).We thank the J-PARC accelerator team for the superb accelerator performance and CERN NA61 colleagues for providing essential particle production data and for their fruitful collaboration. We acknowledge the support of MEXT, Japan; NSERC, NRC and CFI, Canada; CEA and CNRS/IN2P3, France; DFG, Germany; INFN, Italy; Ministry of Science and Higher Education, Poland; RAS, RFBR and the Ministry of Education and Science of the Russian Federation; MEST and NRF, South Korea; MICINN and CPAN, Spain; SNSF and SER, Switzerland; STFC, U.K.; NSF and DOE, USA We also thank CERN for their donation of the UA1/NOMAD magnet and DESY for the HERA-B magnet mover system. In addition, participation of individual researchers and institutions in T2K has been further supported by funds from ERC (FP7), EU; JSPS, Japan; Royal Society, UK; DOE Early Career program, and the A. P. Sloan Foundation, USA Computations were performed on the supercomputers at the SciNet [115] HPC Consortium. SciNet is funded by the Canada Foundation for Innovation under the auspices of Compute Canada; the Government of Ontario; Ontario Research Fund - Research Excellence; and the University of Toronto.Peer reviewedAmerican Physical SocietyCentro Nacional de Física de Partículas, Astropartículas y Nuclear (España)Ministerio de Economía y Competitividad (España)Ministry of Education, Culture, Sports, Science and Technology (Japan)Natural Sciences and Engineering Research Council of CanadaGerman Research FoundationMinistry of Science and Higher Education (Poland)Russian Foundation for Basic ResearchNational Research Foundation of KoreaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/126330reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevD.88.032002Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1263302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Evidence of electron neutrino appearance in a muon neutrino beam
title Evidence of electron neutrino appearance in a muon neutrino beam
spellingShingle Evidence of electron neutrino appearance in a muon neutrino beam
T2K Collaboration
Absorption cross-sections
Momentum range
ddc:500.2
title_short Evidence of electron neutrino appearance in a muon neutrino beam
title_full Evidence of electron neutrino appearance in a muon neutrino beam
title_fullStr Evidence of electron neutrino appearance in a muon neutrino beam
title_full_unstemmed Evidence of electron neutrino appearance in a muon neutrino beam
title_sort Evidence of electron neutrino appearance in a muon neutrino beam
dc.creator.none.fl_str_mv T2K Collaboration
Abe, Kou
Cervera Villanueva, Anselmo
Escudero Sánchez, Lorena
Gómez Cadenas, Juan José
Izmaylov, A.
Monfregola, Laura
Sorel, Michel
Stamoulis, Panagiotis
author T2K Collaboration
author_facet T2K Collaboration
Abe, Kou
Cervera Villanueva, Anselmo
Escudero Sánchez, Lorena
Gómez Cadenas, Juan José
Izmaylov, A.
Monfregola, Laura
Sorel, Michel
Stamoulis, Panagiotis
author_role author
author2 Abe, Kou
Cervera Villanueva, Anselmo
Escudero Sánchez, Lorena
Gómez Cadenas, Juan José
Izmaylov, A.
Monfregola, Laura
Sorel, Michel
Stamoulis, Panagiotis
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Centro Nacional de Física de Partículas, Astropartículas y Nuclear (España)
Ministerio de Economía y Competitividad (España)
Ministry of Education, Culture, Sports, Science and Technology (Japan)
Natural Sciences and Engineering Research Council of Canada
German Research Foundation
Ministry of Science and Higher Education (Poland)
Russian Foundation for Basic Research
National Research Foundation of Korea
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Absorption cross-sections
Momentum range
ddc:500.2
topic Absorption cross-sections
Momentum range
ddc:500.2
description 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).
publishDate 2013
dc.date.none.fl_str_mv 2013
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/126330
url http://hdl.handle.net/10261/126330
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevD.88.032002
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409338734411776
score 15.812455

Similares en LA Referencia