Author/Authors :
Schmelling، نويسنده , , M. A. Hashim، نويسنده , , N.O. and Grupen، نويسنده , , C. and Luitz، نويسنده , , S. and Maciuc، نويسنده , , F. and Mailov، نويسنده , , A. and Müller، نويسنده , , A.-S. and Sander، نويسنده , , H.-G. and Schmeling، نويسنده , , S. and Tcaciuc، نويسنده , , R. and Wachsmuth، نويسنده , , H. Kirk Ziegler، نويسنده , , T. and Zuber، نويسنده , , K.، نويسنده ,
Abstract :
The ALEPH detector at LEP has been used to measure the momentum spectrum and charge ratio of vertical cosmic ray muons underground. The sea-level cosmic ray muon spectrum for momenta up to 2.5 TeV/c has been obtained by correcting for the overburden of 320 m water equivalent (mwe). The results are compared with Monte Carlo models for air shower development in the atmosphere. From the analysis of the spectrum the total flux and the spectral index of the cosmic ray primaries is inferred. The charge ratio suggests a dominantly light composition of cosmic ray primaries with energies in the energy range between 10 3 and 10 5 GeV.
Keywords :
Cosmic ray muons , Momentum spectrum , Charge ratio , aleph , Chemical composition of primary cosmic rays , Underground measurement
