Artículo
Abstract:
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.
Registro:
| Documento: | Artículo |
| Título: | Improving photon-hadron discrimination based on cosmic ray surface detector data |
| Autor: | Ros, G.; Supanitsky, A.D.; Medina-Tanco, G.A.; Del Peral, L.; Rodríguez-Frías, M.D. |
| Filiación: | Space and Astroparticle Group, Dpto. Física y Matemáticas, Universidad de Alcalá, Ctra. Madrid-Barcelona km. 33, Alcalá de Henares E-28871, Spain Instituto de Astronomía y Física del Espacio, IAFE, CONICET-UBA, Argentina Instituto de Ciencias Nucleares, UNAM, Circuito Exteriror S/N, Ciudad Universitaria, Mexico D. F. 04510, Mexico |
| Palabras clave: | Cherenkov detectors; Cosmic rays; Photon discrimination; Sb parameter; Array geometries; Cherenkov Detectors; Photon discrimination; Primary energies; Reconstruction efficiency; Sb parameter; Surface parameter; Ultrahigh-energy cosmic rays; Cosmic rays; Hadrons; Photons |
| Año: | 2013 |
| Volumen: | 47 |
| Página de inicio: | 10 |
| Página de fin: | 17 |
| DOI: | http://dx.doi.org/10.1016/j.astropartphys.2013.05.014 |
| Título revista: | Astroparticle Physics |
| Título revista abreviado: | Astropart. Phys. |
| ISSN: | 09276505 |
| CODEN: | APHYE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09276505_v47_n_p10_Ros |
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Citas:
---------- APA ----------
Ros, G., Supanitsky, A.D., Medina-Tanco, G.A., Del Peral, L. & Rodríguez-Frías, M.D. (2013) . Improving photon-hadron discrimination based on cosmic ray surface detector data. Astroparticle Physics, 47, 10-17.http://dx.doi.org/10.1016/j.astropartphys.2013.05.014
---------- CHICAGO ----------
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" . Astroparticle Physics 47 (2013) : 10-17.http://dx.doi.org/10.1016/j.astropartphys.2013.05.014
---------- MLA ----------
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" . Astroparticle Physics, vol. 47, 2013, pp. 10-17.http://dx.doi.org/10.1016/j.astropartphys.2013.05.014
---------- VANCOUVER ----------
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. Astropart. Phys. 2013;47:10-17.http://dx.doi.org/10.1016/j.astropartphys.2013.05.014
