Artículo
Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications
Aab, A.; Abreu, P.; Aglietta, M.; Ahn, E. J.; Al Samarai, I.; Albuquerque, I. F. M.; Allekotte, Ingomar; Allen, J.; Allison, P.; Almela, A.; Alvarez Castillo, J.; Alvarez Muñiz, J.; Alves Batista, R.; Dova, Maria Teresa
; Taborda Pulgarin, Oscar Alejandro
; Purrello, Víctor Hugo
; Martins Dos Santos, Eva Maria
; Ravignani Guerrero, Diego; Almela, Daniel Alejandro
; Josebachuili Ogando, Mariela Gisele
; Gomez Berisso, Mariano
; Bertou, Xavier Pierre Louis
; Wahlberg, Hernan Pablo
; Wundheiler, Brian
; Tapia Casanova, Alex Marcelo
; Asorey, Hernán Gonzalo
; Sciutto, Sergio Juan
; Quel, Eduardo Jaime
; Melo, Diego Gabriel
; Sanchez, Federico Andrés
Fecha de publicación:
09/2014
Editorial:
American Physical Society
Revista:
Physical Review D: Particles, Fields, Gravitation And Cosmology
ISSN:
1550-7998
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Using the data taken at the Pierre Auger Observatory between December 2004 and December 2012, we have examined the implications of the distributions of depths of atmospheric shower maximum (Xmax), using a hybrid technique, for composition and hadronic interaction models. We do this by fitting the distributions with predictions from a variety of hadronic interaction models for variations in the composition of the primary cosmic rays and examining the quality of the fit. Regardless of what interaction model is assumed, we find that our data are not well described by a mix of protons and iron nuclei over most of the energy range. Acceptable fits can be obtained when intermediate masses are included, and when this is done consistent results for the proton and iron-nuclei contributions can be found using the available models. We observe a strong energy dependence of the resulting proton fractions, and find no support from any of the models for a significant contribution from iron nuclei. However, we also observe a significant disagreement between the models with respect to the relative contributions of the intermediate components.
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Articulos(ITEDA)
Articulos de INSTITUTO DE TEC. EN DETECCION Y ASTROPARTICULAS
Articulos de INSTITUTO DE TEC. EN DETECCION Y ASTROPARTICULAS
Articulos(UNIDEF)
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Citación
Aab, A.; Abreu, P.; Aglietta, M.; Ahn, E. J.; Al Samarai, I.; et al.; Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications; American Physical Society; Physical Review D: Particles, Fields, Gravitation And Cosmology; 2014; 006; 9-2014; 1-12
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