Testing hadronic interactions at ultrahigh energies with air showers measured by the Pierre Auger Observatory
Journal Article
·
· Physical Review Letters
Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6–16 EeV (ECM = 110–170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. As a result, the average hadronic shower is 1.33±0.16 (1.61±0.21) times larger than predicted using the leading LHC-tuned models EPOS-LHC (QGSJetII-04), with a corresponding excess of muons.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- Pierre Auger Collaboration
- Grant/Contract Number:
- AC02-07CH11359; FR02-04ER41300; FG02-99ER41107; SC0011689
- OSTI ID:
- 1333138
- Alternate ID(s):
- OSTI ID: 1330487
- Report Number(s):
- FERMILAB-PUB-16-504-AD-AE-CD-TD; arXiv:1610.08509; PRLTAO; 1494752
- Journal Information:
- Physical Review Letters, Vol. 117, Issue 19; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 147 works
Citation information provided by
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