Predicting the UHE photon flux from GZK-interactions of hadronic cosmic rays using CRPropa 3

0565638 - FZÚ 2023 RIV IT eng C - Konferenční příspěvek (zahraniční konf.)
Bobrikova, A. … celkem 4 autorů
Predicting the UHE photon flux from GZK-interactions of hadronic cosmic rays using CRPropa 3.
Proceedings of Science. Vol. 395. Trieste: Sissa Medilab srl, 2022, č. článku 449. ISSN 1824-8039.
[International Cosmic Ray Conference /37./. Berlin (DE), 12.07.2021-23.07.2021]
Výzkumná infrastruktura: AUGER-CZ II - 90102
Klíčová slova: ultra high energy cosmic rays * cosmic microwave background
Obor OECD: Particles and field physics
https://pos.sissa.it/395/449

The spectrum of ultra high energy (UHE) cosmic rays as measured by the Pierre Auger Observatory indicates a strong flux suppression above 50 EeV. The origin of this suppression is still unclear. One possible explanation is the Greisen-Zatsepin-Kuzmin (GZK) process, in which UHE cosmic rays interact with the cosmic microwave background. Indirect evidence for the GZK-process could be provided by the search for UHE photons produced in such an interaction. A signal of UHE photons could not yet be identified among the cosmic rays. Hence, upper limits on the UHE photon flux have been derived from experimental data of various experiments. In order to interpret these limits, theoretical predictions are needed.In this contribution, new predictions on the UHE photon flux above 10^15.8 eV are derived assuming different compositions of the initial cosmic rays.

Trvalý link: https://hdl.handle.net/11104/0337159