An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory
An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than 10<sup>19</sup> eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory. This is the first such limit on ph...
| Autores principales: | , , , , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2007
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/80562 |
| Aporte de: |
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I19-R120-10915-80562 |
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| 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 Radiación cósmica Fotones Cascada atmosférica extensa Pierre Auger Observatory |
| spellingShingle |
Ciencias Exactas Física Radiación cósmica Fotones Cascada atmosférica extensa Pierre Auger Observatory Badagnani, Daniel Omar Dova, María Teresa Epele, Luis Nicolás Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Sciutto, Sergio Juan Tueros, Matías Jorge Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| topic_facet |
Ciencias Exactas Física Radiación cósmica Fotones Cascada atmosférica extensa Pierre Auger Observatory |
| description |
An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than 10<sup>19</sup> eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory. This is the first such limit on photons obtained by observing the fluorescence light profile of air showers. This upper limit confirms and improves on previous results from the Haverah Park and AGASA surface arrays. Additional data recorded with the Auger surface detectors for a subset of the event sample support the conclusion that a photon origin of the observed events is not favored. |
| format |
Articulo Articulo |
| author |
Badagnani, Daniel Omar Dova, María Teresa Epele, Luis Nicolás Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Sciutto, Sergio Juan Tueros, Matías Jorge Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author_facet |
Badagnani, Daniel Omar Dova, María Teresa Epele, Luis Nicolás Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Sciutto, Sergio Juan Tueros, Matías Jorge Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author_sort |
Badagnani, Daniel Omar |
| title |
An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| title_short |
An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| title_full |
An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| title_fullStr |
An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| title_full_unstemmed |
An upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> eV from the Pierre Auger Observatory |
| title_sort |
upper limit to the photon fraction in cosmic rays above 10<sup>19</sup> ev from the pierre auger observatory |
| publishDate |
2007 |
| url |
http://sedici.unlp.edu.ar/handle/10915/80562 |
| work_keys_str_mv |
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Repositorios |
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