We present the first hybrid measurement of the average muon number in air showers at ultrahigh energies, initiated by cosmic rays with zenith angles between 62° and 80°. The measurement is based on 174 hybrid events recorded simultaneously with the surface detector array and the fluorescence detector of the Pierre Auger Observatory. The muon number for each shower is derived by scaling a simulated reference profile of the lateral muon density distribution at the ground until it fits the data. A 1019eV shower with a zenith angle of 67°, which arrives at the surface detector array at an altitude of 1450 m above sea level, contains on average (2.68±0.04±0.48(sys))×107 muons with energies larger than 0.3 GeV. The logarithmic gain dlnNμ/dlnE of muons with increasing energy between 4×1018eV and 5×1019eV is measured to be (1.029±0.024±0.030(sys)). © 2015 American Physical Society.
| Documento: | Artículo |
| Título: | Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events |
| Autor: | Multitudinario:480 |
| Filiación: | Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF, CONICET, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires y CONICET, Argentina IFLP, Universidad Nacional de la Plata, CONICET, La Plata, Argentina Instituto de Astronomía y Física Del Espacio (CONICET-UBA), Buenos Aires, Argentina 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), National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina Observatorio Pierre Auger, Malargüe, Argentina Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina Universidad Tecnológica Nacional, Facultad Regional Buenos Aires, Buenos Aires, Argentina University of Adelaide, Adelaide, S.A., Australia Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil Faculdade Independente Do Nordeste, Vitória da Conquista, Brazil Universidade de São Paulo, Escola de Engenharia de Lorena, Lorena, SP, Brazil Universidade de São Paulo, Instituto de Física de São Carlos, São Carlos, SP, Brazil Universidade de São Paulo, Instituto de Física, São Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Universidade Estadual de Feira de Santana, Brazil Universidade Federal da Bahia, Salvador, BA, Brazil Universidade Federal de Pelotas, Pelotas, RS, Brazil Universidade Federal Do ABC, Santo-André, SP, Brazil Universidade Federal Do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ, Brazil Rudjer Bošković Institute, Zagreb, 10000, Croatia Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic Palacky University, RCPTM, Olomouc, Czech Republic Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, France 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 Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, France SUBATECH, École des Mines de Nantes, Université de Nantes, France Bergische Universität Wuppertal, Wuppertal, Germany Karlsruhe Institute of Technology, Campus South - Institut für Experimentelle Kernphysik (IEKP), Karlsruhe, Germany Karlsruhe Institute of Technology, Campus North - Institut für Kernphysik, Karlsruhe, Germany Karlsruhe Institute of Technology, Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany Max-Planck-Institut für Radioastronomie, Bonn, Germany RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany Universität Hamburg, Hamburg, Germany Universität Siegen, Siegen, Germany Università di Milano, Sezione INFN, Milan, Italy Università di Napoli Federico II, Sezione INFN, Napoli, Italy Università di Roma II Tor Vergata, Sezione INFN, Rome, Italy Università di Catania, Sezione INFN, Catania, Italy Università di Torino, Sezione INFN, Torino, Italy Dipartimento di Matematica e Fisica E. de Giorgi, Università Del Salento, Sezione INFN, Lecce, Italy Dipartimento di Scienze Fisiche e Chimiche, Università dell'Aquila, INFN, Italy Gran Sasso Science Institute (INFN), L'Aquila, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy INFN, Laboratori Nazionali Del Gran Sasso, Assergi (l'Aquila), Italy Osservatorio Astrofisico di Torino (INAF), Università di Torino, Sezione INFN, Torino, Italy Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Centro de Investigación y de Estudios Avanzados Del IPN (CINVESTAV), México, Mexico Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan, Mexico Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico IMAPP, Radboud University Nijmegen, Netherlands KVI - Center for Advanced Radiation Technology, University of Groningen, Netherlands Nikhef, Science Park, Amsterdam, Netherlands ASTRON, Dwingeloo, Netherlands Institute of Nuclear Physics PAN, Krakow, Poland University of Łódź, Łódź, Poland Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP, Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Portugal 'Horia Hulubei' National Institute for Physics and Nuclear Engineering, Bucharest- Magurele, Romania Institute of Space Sciences, Bucharest, Romania University of Bucharest, Physics Department, Romania University Politehnica of Bucharest, Romania Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Universidad Complutense de Madrid, Madrid, Spain Universidad de Alcalá, Alcalá de Henares (Madrid), Spain Universidad de Granada, C.A.F.P.E., Granada, Spain Universidad de Santiago de Compostela, Spain School of Physics and Astronomy, University of Leeds, United Kingdom Case Western Reserve University, Cleveland, OH 44106, United States Colorado School of Mines, Golden, CO 80401, United States Colorado State University, Fort Collins, CO 80523, United States Colorado State University, Pueblo, CO 81001, United States Department of Physics and Astronomy, Lehman College, City University of New York, New York, NY 10468, United States Fermilab, Batavia, IL 60510-0500, United States Los Alamos National Laboratory, Los Alamos, NM 87545, United States Louisiana State University, Baton Rouge, LA 70803-4001, United States Michigan Technological University, Houghton, MI 49931-1295, United States New York University, New York, NY 10003, United States Northeastern University, Boston, MA 02115-5096, United States Ohio State University, Columbus, OH 43210-1061, United States Pennsylvania State University, University Park, PA 16802-6300, United States University of Chicago, Enrico Fermi Institute, Chicago, IL 60637, United States University of Hawaii, Honolulu, HI 96822, United States University of Nebraska, Lincoln, NE 68588-0111, United States University of New Mexico, Albuquerque, NM 87131, United States University of Wisconsin, Milwaukee, WI 53201, United States |
| Año: | 2015 |
| Volumen: | 91 |
| Número: | 3 |
| DOI: | http://dx.doi.org/10.1103/PhysRevD.91.032003 |
| 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_n3_p_Multitudinario |
