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Title: Testing hadronic interactions at ultrahigh energies with air showers measured by the Pierre Auger Observatory

Journal Article · · Physical Review Letters
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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
Citation Metrics:
Cited by: 147 works
Citation information provided by
Web of Science

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Cited By (30)

Neutrino tomography of Earth journal November 2018
Imaging the nucleus with high-energy photons journal October 2019
Recent results from the Pierre Auger Observatory on the mass composition and hadronic interactions of ultra-high energy cosmic rays journal January 2017
Model-stable universality of the air shower electromagnetic component: An approach to solving the mass composition problem journal January 2017
Determination of the primary energy using an ultrathin calorimeter journal February 2020
Long-lived particles at the energy frontier: the MATHUSLA physics case journal October 2019
Unified atmospheric neutrino passing fractions for large-scale neutrino telescopes journal July 2018
On the efficiency of the evaluation of the primary cosmic ray composition using lateral distributions of air shower electromagnetic component journal February 2019
James Watson Cronin. 29 September 1931 — 25 August 2016 journal September 2018
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors journal April 2019
Measurement of nearly horizontal cosmic muons at high altitudes with the MEV telescope journal June 2019
Multi-Messenger Physics With the Pierre Auger Observatory text January 2019
The hadronic interaction model Sibyll – past, present and future text January 2017
Open Questions in Cosmic-Ray Research at Ultrahigh Energies journal June 2019
Model-stable universality of the air shower electromagnetic component: An approach to solving the mass composition problem journal January 2017
The hadronic interaction model Sibyll – past, present and future journal January 2017
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors text January 2019
Multi-Messenger Physics With the Pierre Auger Observatory journal April 2019
Open Questions in Cosmic-Ray Research at Ultrahigh Energies text January 2019
Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions text January 2016
Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions text January 2017
Determining the fraction of cosmic-ray protons at ultra-high energies with cosmogenic neutrinos text January 2019
Open Questions in Cosmic-Ray Research at Ultrahigh Energies text January 2019
Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions text January 2016
Model-Stable Universality of the Air Shower Electromagnetic Component: an Approach to Solving the Mass Composition Problem text January 2016
Unified atmospheric neutrino passing fractions for large-scale neutrino telescopes text January 2018
Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case text January 2018
On the efficiency of the evaluation of the primary cosmic ray composition using lateral distributions of air shower electromagnetic component text January 2018
Determining the fraction of cosmic-ray protons at ultra-high energies with cosmogenic neutrinos text January 2019
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors text January 2019

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