Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events

  title={Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events},
  author={Pierre Auger Collaboration},
We present the first hybrid measurement of the average muon number in air showers at ultra-high energies, initiated by cosmic rays with zenith angles between $62^\circ$ and $80^\circ$. The measurement is based on 174 hybrid events recorded simultaneously with the Surface Detector array and the Fluorescence Detector of the Pierre Auger Observatory. The muon number for each shower is derived by scaling a simulated reference profile of the lateral muon density distribution at the ground until it… 

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