Measurement of the cosmic-ray muon spectrum and charge ratio at large zenith angles in the momentum range 100 GeV/<i>c</i>to 10 TeV/<i>c</i>using a magnet spectrometer

Abstract

The cosmic-ray muon momentum spectrum and charge ratio up to momenta \ensuremath{\simeq} 10 TeV/c have been measured with high accuracy. The power index of the differential spectrum of parent mesons at production gradually increases with momentum and becomes 2.84\ifmmode\pm\else\textpm\fi{}0.03 in the momentum range 0.8 to 10 TeV/c. The charge ratio is almost constant at a value of 1.27\ifmmode\pm\else\textpm\fi{}0.02 from 0.1 to 10 TeV/c.