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

0464049 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Aab, A. - Abreu, P. - Aglietta, M. - Blažek, Jiří - 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 434 autorů
Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory.
Physical Review D. Roč. 93, č. 7 (2016), s. 1-16, č. článku 072006. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA MŠMT(CZ) LG13007; GA MŠMT(CZ) 7AMB14AR005; GA ČR(CZ) GA14-17501S; GA MŠMT LM2015038
Institucionální podpora: RVO:68378271
Klíčová slova: Pierre Auger Observatory * cosmic rays * surface detector
Obor OECD: Particles and field physics
Impakt faktor: 4.557, rok: 2016
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevD.93.072006

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, (sec theta)(max), sensitive to the mass composition of cosmic rays above 3 x 10(18) 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.

Trvalý link: http://hdl.handle.net/11104/0263115