Improving photon-hadron discrimination based on cosmic ray surface detector data
The search for photons at EeV energies and beyond has considerable astrophysical interest and will remain one of the key challenges for ultra-high energy cosmic ray (UHECR) observatories in the near future. Several upper limits to the photon flux have been established since no photon has been unambi...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_09276505_v47_n_p10_Ros |
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todo:paper_09276505_v47_n_p10_Ros2023-10-03T15:47:01Z Improving photon-hadron discrimination based on cosmic ray surface detector data Ros, G. Supanitsky, A.D. Medina-Tanco, G.A. Del Peral, L. Rodríguez-Frías, M.D. Cherenkov detectors Cosmic rays Photon discrimination Sb parameter Array geometries Cherenkov Detectors Photon discrimination Primary energies Reconstruction efficiency S<sup>b</sup> parameter Surface parameter Ultrahigh-energy cosmic rays Cosmic rays Hadrons Photons The search for photons at EeV energies and beyond has considerable astrophysical interest and will remain one of the key challenges for ultra-high energy cosmic ray (UHECR) observatories in the near future. Several upper limits to the photon flux have been established since no photon has been unambiguously observed up to now. An improvement in the reconstruction efficiency of the photon showers and/or better discrimination tools are needed to improve these limits apart from an increase in statistics. Following this direction, we analyze in this work the ability of the surface parameter Sb, originally proposed for hadron discrimination, for photon search. Semi-analytical and numerical studies are performed in order to optimize S b for the discrimination of photons from a proton background in the energy range from 1018.5 to 1019.6 eV. Although not shown explicitly, the same analysis has been performed for Fe nuclei and the corresponding results are discussed when appropriate. The effects of different array geometries and the underestimation of the muon component in the shower simulations are analyzed, as well as the Sb dependence on primary energy and zenith angle. © 2013 Elsevier B.V. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09276505_v47_n_p10_Ros |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cherenkov detectors Cosmic rays Photon discrimination Sb parameter Array geometries Cherenkov Detectors Photon discrimination Primary energies Reconstruction efficiency S<sup>b</sup> parameter Surface parameter Ultrahigh-energy cosmic rays Cosmic rays Hadrons Photons |
| spellingShingle |
Cherenkov detectors Cosmic rays Photon discrimination Sb parameter Array geometries Cherenkov Detectors Photon discrimination Primary energies Reconstruction efficiency S<sup>b</sup> parameter Surface parameter Ultrahigh-energy cosmic rays Cosmic rays Hadrons Photons Ros, G. Supanitsky, A.D. Medina-Tanco, G.A. Del Peral, L. Rodríguez-Frías, M.D. Improving photon-hadron discrimination based on cosmic ray surface detector data |
| topic_facet |
Cherenkov detectors Cosmic rays Photon discrimination Sb parameter Array geometries Cherenkov Detectors Photon discrimination Primary energies Reconstruction efficiency S<sup>b</sup> parameter Surface parameter Ultrahigh-energy cosmic rays Cosmic rays Hadrons Photons |
| description |
The search for photons at EeV energies and beyond has considerable astrophysical interest and will remain one of the key challenges for ultra-high energy cosmic ray (UHECR) observatories in the near future. Several upper limits to the photon flux have been established since no photon has been unambiguously observed up to now. An improvement in the reconstruction efficiency of the photon showers and/or better discrimination tools are needed to improve these limits apart from an increase in statistics. Following this direction, we analyze in this work the ability of the surface parameter Sb, originally proposed for hadron discrimination, for photon search. Semi-analytical and numerical studies are performed in order to optimize S b for the discrimination of photons from a proton background in the energy range from 1018.5 to 1019.6 eV. Although not shown explicitly, the same analysis has been performed for Fe nuclei and the corresponding results are discussed when appropriate. The effects of different array geometries and the underestimation of the muon component in the shower simulations are analyzed, as well as the Sb dependence on primary energy and zenith angle. © 2013 Elsevier B.V. All rights reserved. |
| format |
JOUR |
| author |
Ros, G. Supanitsky, A.D. Medina-Tanco, G.A. Del Peral, L. Rodríguez-Frías, M.D. |
| author_facet |
Ros, G. Supanitsky, A.D. Medina-Tanco, G.A. Del Peral, L. Rodríguez-Frías, M.D. |
| author_sort |
Ros, G. |
| title |
Improving photon-hadron discrimination based on cosmic ray surface detector data |
| title_short |
Improving photon-hadron discrimination based on cosmic ray surface detector data |
| title_full |
Improving photon-hadron discrimination based on cosmic ray surface detector data |
| title_fullStr |
Improving photon-hadron discrimination based on cosmic ray surface detector data |
| title_full_unstemmed |
Improving photon-hadron discrimination based on cosmic ray surface detector data |
| title_sort |
improving photon-hadron discrimination based on cosmic ray surface detector data |
| url |
http://hdl.handle.net/20.500.12110/paper_09276505_v47_n_p10_Ros |
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