Počet záznamů: 1
Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications
- 1.0455665 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Aab, A. - Abreu, P. - Aglietta, M. - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Mandát, Dušan - Nečesal, Petr - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - Schovánek, Petr - Trávníček, Petr - Vícha, Jakub … celkem 485 autorů
Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 90, č. 12 (2014), "122006-1"-"122006-12". ISSN 1550-7998
Grant CEP: GA MŠk(CZ) LG13007; GA MŠk(CZ) 7AMB14AR005; GA ČR(CZ) GA14-17501S
Institucionální podpora: RVO:68378271
Klíčová slova: Pierre Auger Observatory * air-shower * fluorescence telescopes
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.643, rok: 2014
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.
Trvalý link: http://hdl.handle.net/11104/0256284
Počet záznamů: 1