Author/Authors :
Grupen، نويسنده , , Jack C. Lee & Kurt S.H. Shao، نويسنده , , M.T. and Mailov، نويسنده , , A. and Müller، نويسنده , , A.S. and Putzer، نويسنده , , A. and Rensch، نويسنده , , B. and Sander، نويسنده , , H.G. and Schmeling، نويسنده , , S. and Schmelling، نويسنده , , M. and Wachsmuth، نويسنده , , H. Kirk Ziegler، نويسنده , , T. and Zuber، نويسنده , , K.، نويسنده ,
Abstract :
The ALEPH detector at LEP has been supplemented with five scintillator telescopes to measure the muon component of cosmic ray air showers underground. The emphasis of the present analysis of a new data set is to measure coincidences over distances up to about 1 km which are sensitive to the forward production of hadronic interactions and the chemical composition of primary cosmic rays in the energy range around 1015 eV. First results indicate that the observed decoherence curve of muons is compatible with a light primary composition and the arrival directions of muons show no obvious clustering in galactic coordinates.
Keywords :
Cosmic ray , Muon , composition , shower , Galactic
