Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory

From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV ≣ 10<sup>18</sup...

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Autores principales: Badagnani, Daniel Omar, Dova, María Teresa, Gómez Albarracín, Flavia Alejandra, Hansen, Patricia María, Mariazzi, Analisa Gabriela, Moreno, Juan Cruz, Tarutina, Tatiana, Tueros, Matías Jorge, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Exactas
Física
Cascada atmosférica
Pierre Auger Observatory
Radiación cósmica
Fotones
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80633
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80633
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Cascada atmosférica
Pierre Auger Observatory
Radiación cósmica
Fotones
spellingShingle Ciencias Exactas
Física
Cascada atmosférica
Pierre Auger Observatory
Radiación cósmica
Fotones
Badagnani, Daniel Omar
Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Tarutina, Tatiana
Tueros, Matías Jorge
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
topic_facet Ciencias Exactas
Física
Cascada atmosférica
Pierre Auger Observatory
Radiación cósmica
Fotones
description From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV ≣ 10<sup>18</sup> eV), respectively. These are the first experimental limits on ultra-high energy photons at energies below 10 EeV. The results complement previous constraints on top–down models from array data and they reduce systematic uncertainties in the interpretation of shower data in terms of primary flux, nuclear composition and protonair cross-section.
format Articulo
Articulo
author Badagnani, Daniel Omar
Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Tarutina, Tatiana
Tueros, Matías Jorge
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_facet Badagnani, Daniel Omar
Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Tarutina, Tatiana
Tueros, Matías Jorge
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_sort Badagnani, Daniel Omar
title Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
title_short Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
title_full Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
title_fullStr Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
title_full_unstemmed Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
title_sort upper limit on the cosmic-ray photon fraction at eev energies from the pierre auger observatory
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/80633
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