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 (E_CM = 110–170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. 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

Aab, Abreu P., Aglietta M., Ahn E.J., Al Samarai I., Albuquerque I.F.M., et al. (2016). Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory. PHYSICAL REVIEW LETTERS, 117(19) [10.1103/PhysRevLett.117.192001].

Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory

Buscemi M.;Marsella G.;
2016-01-01

Abstract

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 (E_CM = 110–170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. 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
2016
Settore FIS/01 - Fisica Sperimentale
Aab, Abreu P., Aglietta M., Ahn E.J., Al Samarai I., Albuquerque I.F.M., et al. (2016). Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory. PHYSICAL REVIEW LETTERS, 117(19) [10.1103/PhysRevLett.117.192001].
File in questo prodotto:
File Dimensione Formato  
Physics_Review_Letters2016_testingHadronicInteractions_Auger.pdf

Solo gestori archvio

Descrizione: Articolo
Tipologia: Versione Editoriale
Dimensione 504.78 kB
Formato Adobe PDF
504.78 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
PhysRevLett.117.192001-accepted.pdf

accesso aperto

Tipologia: Post-print
Dimensione 671.5 kB
Formato Adobe PDF
671.5 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/466533
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 163
  • ???jsp.display-item.citation.isi??? 151
social impact