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Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube.
Aartsen, M G; Abraham, K; Ackermann, M; Adams, J; Aguilar, J A; Ahlers, M; Ahrens, M; Altmann, D; Anderson, T; Archinger, M; Arguelles, C; Arlen, T C; Auffenberg, J; Bai, X; Barwick, S W; Baum, V; Bay, R; Beatty, J J; Tjus, J Becker; Becker, K-H; Beiser, E; BenZvi, S; Berghaus, P; Berley, D; Bernardini, E; Bernhard, A; Besson, D Z; Binder, G; Bindig, D; Bissok, M; Blaufuss, E; Blumenthal, J; Boersma, D J; Bohm, C; Börner, M; Bos, F; Bose, D; Böser, S; Botner, O; Braun, J; Brayeur, L; Bretz, H-P; Brown, A M; Buzinsky, N; Casey, J; Casier, M; Cheung, E; Chirkin, D; Christov, A; Christy, B.
Afiliación
  • Aartsen MG; School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, Australia.
  • Abraham K; Technische Universität München, D-85748 Garching, Germany.
  • Ackermann M; DESY, D-15735 Zeuthen, Germany.
  • Adams J; Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
  • Aguilar JA; Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium.
  • Ahlers M; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
  • Ahrens M; Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden.
  • Altmann D; Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany.
  • Anderson T; Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
  • Archinger M; Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
  • Arguelles C; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
  • Arlen TC; Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
  • Auffenberg J; III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany.
  • Bai X; Physics Department, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
  • Barwick SW; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Baum V; Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
  • Bay R; Department of Physics, University of California, Berkeley, California 94720, USA.
  • Beatty JJ; Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210, USA.
  • Tjus JB; Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA.
  • Becker KH; Fakultät für Physik and Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
  • Beiser E; Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany.
  • BenZvi S; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
  • Berghaus P; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
  • Berley D; DESY, D-15735 Zeuthen, Germany.
  • Bernardini E; Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
  • Bernhard A; DESY, D-15735 Zeuthen, Germany.
  • Besson DZ; Technische Universität München, D-85748 Garching, Germany.
  • Binder G; Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA.
  • Bindig D; Department of Physics, University of California, Berkeley, California 94720, USA.
  • Bissok M; Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Blaufuss E; Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany.
  • Blumenthal J; III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany.
  • Boersma DJ; Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
  • Bohm C; III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany.
  • Börner M; Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden.
  • Bos F; Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden.
  • Bose D; Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany.
  • Böser S; Fakultät für Physik and Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
  • Botner O; Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea.
  • Braun J; Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
  • Brayeur L; Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden.
  • Bretz HP; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
  • Brown AM; Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium.
  • Buzinsky N; DESY, D-15735 Zeuthen, Germany.
  • Casey J; Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
  • Casier M; Department of Physics, University of Alberta, Edmonton, Alberta, Canada, T6G 2E1.
  • Cheung E; School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
  • Chirkin D; Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium.
  • Christov A; Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
  • Christy B; Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA.
Phys Rev Lett ; 115(8): 081102, 2015 Aug 21.
Article en En | MEDLINE | ID: mdl-26340177
ABSTRACT
Results from the IceCube Neutrino Observatory have recently provided compelling evidence for the existence of a high energy astrophysical neutrino flux utilizing a dominantly Southern Hemisphere data set consisting primarily of ν(e) and ν(τ) charged-current and neutral-current (cascade) neutrino interactions. In the analysis presented here, a data sample of approximately 35,000 muon neutrinos from the Northern sky is extracted from data taken during 659.5 days of live time recorded between May 2010 and May 2012. While this sample is composed primarily of neutrinos produced by cosmic ray interactions in Earth's atmosphere, the highest energy events are inconsistent with a hypothesis of solely terrestrial origin at 3.7σ significance. These neutrinos can, however, be explained by an astrophysical flux per neutrino flavor at a level of Φ(E(ν))=9.9(-3.4)(+3.9)×10(-19) GeV(-1) cm(-2) sr(-1) s(-1)(E(ν)/100 TeV(-2), consistent with IceCube's Southern-Hemisphere-dominated result. Additionally, a fit for an astrophysical flux with an arbitrary spectral index is performed. We find a spectral index of 2.2(-0.2)(+0.2), which is also in good agreement with the Southern Hemisphere result.
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Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2015 Tipo del documento: Article País de afiliación: Australia
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Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2015 Tipo del documento: Article País de afiliación: Australia