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A.WatsonWeber, M.M.WeberWeindl, A.A.WeindlWiencke, L.L.WienckeWilczyński, H.H.WilczyńskiWinchen, T.T.WinchenWittkowski, D.D.WittkowskiWundheiler, B.B.WundheilerWykes, S.S.WykesYang, L.L.YangYapici, T.T.YapiciYelos, D.D.YelosZas, E.E.ZasZavrtanik, D.D.ZavrtanikZavrtanik, M.M.ZavrtanikZepeda, A.A.ZepedaZimmermann, B.B.ZimmermannZiolkowski, M.M.ZiolkowskiZong, Z.Z.ZongZuccarello, FrancescaFrancescaZuccarelloPierre Auger Collaboration2020-06-012020-06-0120160031-9007http://hdl.handle.net/20.500.12386/25318Ultrahigh 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<SUB>CM</SUB>=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.STAMPAenArticle10.1103/PhysRevLett.117.1920012-s2.0-84994571209000394971700002https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.192001http://arxiv.org/abs/1610.08509v22016PhRvL.117s2001AFIS/05 - ASTRONOMIA E ASTROFISICA