Improved limit to the diffuse flux of ultra-high energy neutrinos from the Pierre Auger Observatory

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 di...

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Detalles Bibliográficos
Autores: Almela, Daniel Alejandro, Asorey, Hernán Gonzalo, Bertou, Xavier Pierre Louis, Dasso, Sergio Ricardo, Dova, Maria Teresa, Etchegoyen, Alberto, Figueira, Juan Manuel, Filevich, Alberto, Freire, Martín Miguel, Garcia, Beatriz Elena, Golup, Geraldina Tamara, Gonzalez Albarracin, Flavia Alejandra, Gomez Berisso, Mariano, Guardincerri, Yann, Hampel, Matias Rolf, Hansen, Patricia Maria, Harari, Diego Dario, Jarne, Cecilia Gisele, Josebachuili Ogando, Mariela Gisele, Lucero, Luis Agustin, Mariazzi, Analisa Gabriela, Masías Meza, Jimmy Joel, Melo, Diego Gabriel, Micheletti, Maria Isabel, Mollerach, Maria Silvia, Pallotta, Juan Vicente, Piegaia, Ricardo Nestor, Pieroni, Pablo Emanuel, Platino, Manuel, Quel, Eduardo Jaime, Roulet, Esteban, Rovero, Adrian Carlos, Sanchez, Federico Andrés, Sciutto, Sergio Juan, Sidelnik, Iván Pedro, Suarez, Federico, Supanitsky, Alberto Daniel, Tapia Casanova, Alex Marcelo, Tiffenberg, Javier Sebastian, Wahlberg, Hernan Pablo, Wundheiler, Brian, The Pierre Auger Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/18984
Acceso en línea:http://hdl.handle.net/11336/18984
Access Level:acceso abierto
Palabra clave:Improved
Limit
Diffuse
Flux
Ultra
High
Energy
Neutrinos
Pierre
Auger
Observatory
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario: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 identi- fication 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 × 10^17 eV?2.5 × 10^19 eV is < 6.4 × 10^−9 GeV cm^−2 s^−1 sr^−1.

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