Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory

The azimuthal asymmetry in the risetime of signals in Auger surface detector stations is a source of information on shower development. The azimuthal asymmetry is due to a combination of the longitudinal evolution of the shower and geometrical effects related to the angles of incidence of the partic...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, Hansen, Patricia María, Jarne, Cecilia Gisele, Mariazzi, Analisa Gabriela, Sciutto, Sergio Juan, Wahlberg, Hernán Pablo, Pierre Auger Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Física
Azimuthal asymmetry
Mass estimates
Shower modeling
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86929
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86929
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Azimuthal asymmetry
Mass estimates
Shower modeling
spellingShingle Física
Azimuthal asymmetry
Mass estimates
Shower modeling
Dova, María Teresa
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
Pierre Auger Collaboration
Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
topic_facet Física
Azimuthal asymmetry
Mass estimates
Shower modeling
description The azimuthal asymmetry in the risetime of signals in Auger surface detector stations is a source of information on shower development. The azimuthal asymmetry is due to a combination of the longitudinal evolution of the shower and geometrical effects related to the angles of incidence of the particles into the detectors. The magnitude of the effect depends upon the zenith angle and state of development of the shower and thus provides a novel observable, (secθ)max, sensitive to the mass composition of cosmic rays above 3×1018 eV. By comparing measurements with predictions from shower simulations, we find for both of our adopted models of hadronic physics (QGSJETII-04 and EPOS-LHC) an indication that the mean cosmic-ray mass increases slowly with energy, as has been inferred from other studies. However, the mass estimates are dependent on the shower model and on the range of distance from the shower core selected. Thus the method has uncovered further deficiencies in our understanding of shower modeling that must be resolved before the mass composition can be inferred from (secθ)max.
format Articulo
Articulo
author Dova, María Teresa
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
Pierre Auger Collaboration
author_facet Dova, María Teresa
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
Pierre Auger Collaboration
author_sort Dova, María Teresa
title Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
title_short Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
title_full Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
title_fullStr Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
title_full_unstemmed Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory
title_sort azimuthal asymmetry in the risetime of the surface detector signals of the pierre auger observatory
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/86929
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