Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the Surface Detector array (SD) of the Pierre Auger Observatory. We report here on searches through Auger data from 1 January 2004 until 20 June 2013. No neutrino candidates were found, yielding a limit to the diffuse flux of ultrahigh energy neutrinos that challenges the Waxman-Bahcall bound predictions. Neutrino identification is attempted using the broad time structure of the signals expected in the SD stations, and is efficiently done for neutrinos of all flavors interacting in the atmosphere at large zenith angles, as well as for "Earth-skimming" neutrino interactions in the case of tau neutrinos. In this paper the searches for downward-going neutrinos in the zenith angle bins 60°-75°and 75°-90°as well as for upward-going neutrinos, are combined to give a single limit. The 90% C.L. single-flavor limit to the diffuse flux of ultrahigh energy neutrinos with an E-2 spectrum in the energy range 1.0×1017eV-2.5×1019eV is Eν2dNν/dEν<6.4×10-9GeVcm-2s-1sr-1. © Published by the American Physical Society 2015.
Documento: | Artículo |
Título: | Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger observatory |
Autor: | Multitudinario:464 |
Filiación: | Universität Siegen, Siegen, Germany Laboratório de Instrumentação e Física Experimental de Partículas-LIP, Instituto Superior Técnico-IST, Universidade de Lisboa-UL, Portugal Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy Fermilab, Batavia, IL, United States Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France Universidade de São Paulo, Instituto de Física, São Paulo, S.P., Brazil Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Ohio State University, Columbus, OH, United States Universidad Tecnológica Nacional, Facultad Regional Buenos Aires, Buenos Aires, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA CONICET, UNSAM), Buenos Aires, Argentina Universidad Nacional Autónoma de Mexico, Mexico, D.F., Mexico Universidad de Santiago de Compostela, Spain Universität Hamburg, Hamburg, Germany Università di Napoli Federico II, Sezione INFN, Napoli, Italy IMAPP, Radboud University Nijmegen, Netherlands Department of Physics and Astronomy, Lehman College, City University of New York, New York, United States Universidad Complutense de Madrid, Madrid, Spain University of Bucharest, Physics Department, Romania Universidad Industrial de Santander, Colombia Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, France Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina New York University, New York, NY, United States University Politehnica of Bucharest, Romania University of Adelaide, Adelaide, SA, Australia Karlsruhe Institute of Technology-Campus South-Institut für Experimentelle Kernphysik (IEKP), Karlsruhe, Germany Bergische Universität Wuppertal, Wuppertal, Germany Max-Planck-Institut für Radioastronomie, Bonn, Germany Dipartimento di Matematica e Fisica E. De Giorgi, Università del Salento, Sezione INFN, Lecce, Italy Karlsruhe Institute of Technology-Campus North, Institut für Kernphysik, Karlsruhe, Germany Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic INFN, Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy Universidade Federal do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil Institute of Nuclear Physics PAN, Krakow, Poland Colorado State University, Fort Collins, CO, United States 'Horia Hulubei' National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania Colorado State University, Pueblo, CO, United States Universidad de Granada, C.A.F.P.E., Granada, Spain Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico Università di Milano, Sezione INFN, Milan, Italy Università di Roma II Tor Vergata and Sezione INFN, Roma, Italy Institute of Space Sciences, Bucharest, Romania Università di Catania, Sezione INFN, Catania, Italy Università di Torino, Sezione INFN, Torino, Italy Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Pennsylvania State University, University Park, United States Observatorio Pierre Auger, Malargüe, Argentina Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France Case Western Reserve University, Cleveland, OH, United States University of Chicago, Enrico Fermi Institute, Chicago, IL, United States SUBATECH, École des Mines de Nantes, Université de Nantes, Nantes, France Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, Nançay, France Instituto de Astronomía y Física del Espacio (IAFE CONICET-UBA), Buenos Aires, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires, Argentina Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ, Brazil Nikhef, Science Park, Amsterdam, Netherlands Universidade de São Paulo, Instituto de Física de São Carlos, São Carlos, S.P., Brazil Universidad de Alcalá, Alcalá de Henares, Spain Michigan Technological University, Houghton, MI, United States Dipartimento di Scienze Fisiche e Chimiche, Università dell'Aquila, INFN, Italy KVI-Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands IFLP, Universidad Nacional de La Plata, CONICET, La Plata, Argentina RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany ASTRON, Dwingeloo, Netherlands Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia University of Hawaii, Honolulu, HI, United States Instituto de Física de Rosario (IFIR)-CONICET/U.N.R., Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA CONICET, UNSAM), Universidad Tecnológica Nacional-Facultad Regional Mendoza (CONICET/CNEA), Mendoza, Argentina Karlsruhe Institute of Technology-Campus, North-Institut für Prozessdatenverarbeitung und Elektronik, Germany University of Łódź, Łódź, Poland Universidade Estadual de Feira de Santana, Brazil Palacky University, RCPTM, Olomouc, Czech Republic Colorado School of Mines, Golden, CO, United States University of New Mexico, Albuquerque, NM, United States Universidade Federal do ABC, Santo André, SP, Brazil Benemérita Universidad Autónoma de Puebla, Mexico School of Physics and Astronomy, University of Leeds, United Kingdom Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Mexico, D.F., Mexico Louisiana State University, Baton Rouge, LA, United States Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil Universidade Federal de Pelotas, Pelotas, RS, Brazil Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF, CONICET, Argentina Northeastern University, Boston, MA, United States Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas del Instituto Politécnico Nacional (UPIITA-IPN), Mexico, D.F., Mexico Universidade Federal da Bahia, Salvador, BA, Brazil University of Nebraska, Lincoln, NE, United States Gran Sasso Science Institute (INFN), L'Aquila, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy Universidade de São Paulo, Escola de Engenharia de Lorena, Lorena, SP, Brazil |
Año: | 2015 |
Volumen: | 91 |
Número: | 9 |
DOI: | http://dx.doi.org/10.1103/PhysRevD.91.092008 |
Título revista: | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Título revista abreviado: | Phys Rev D Part Fields Gravit Cosmol |
ISSN: | 15507998 |
CODEN: | PRVDA |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v91_n9_p_Multitudinario |