TY  - JOUR
AU  - Leitgeb, Clara E.
AU  - Parsons, Robert D.
AU  - Taylor, Andrew M.
AU  - Ragan, Kenneth J.
AU  - Berge, David
AU  - Issever, Cigdem
TI  - Probing the cosmic ray background of gamma-ray astronomy with hadron colliders
JO  - Physical review / D
VL  - 112
IS  - 8
SN  - 2470-0010
CY  - Ridge, NY
PB  - American Physical Society
M1  - PUBDB-2025-00764
M1  - arXiv:2509.04040
SP  - 083042
PY  - 2025
N1  - DESY internal reviewer: Priscilla Pani
AB  - Hadronic cosmic particles (cosmic rays) and gamma rays are constantly absorbed in the Earth’s atmosphere and result in air showers of secondary particles. Cherenkov radiation from these atmospheric events is used to measure cosmic gamma rays with ground-based telescopes. We focus here on the dominant hadronic cosmic-ray-initiated background events in the atmosphere, which give rise to gamma-ray-like air showers for gamma-ray telescopes. It is shown that only a small subset of hadronic cosmic-ray interactions, those which produce a large energy neutral pion, are responsible for this background. We subsequently address how the predictions of this background vary depending on the hadronic interaction model adopted. The pseudorapidity range of the energetic pions, with respect to the shower axis produced in these background events, is shown to be large. We show that collider experiments, specifically LHCf and the Relavistic Heavy Ion Collider (RHICf), probe cosmic ray interactions precisely within this pseudorapidity range. Present and future measurements with these instruments are shown to be able to test the ability for current hadronic interaction models to accurately describe these background events.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/djx4-qs8m
UR  - https://bib-pubdb1.desy.de/record/623798
ER  -