/ Experiment-HEP

Cosmic-ray studies using the ALICE detector at LHC

Sitta, Mario (INFN, Italy)

Year: 2017
Page No: 131-138
Pages: 8

Abstract: ALICE, a general purpose experiment designed to investigate nucleus-nucleuscollisions at the CERN LHC, has also been used to detect atmospheric muonsproduced by cosmic-ray interactions in the atmosphere. In this contribution theanalysis of the multiplicity distribution of the atmospheric muons detected byALICE between 2010 and 2013 is presented, along with the comparison with MonteCarlo simulations. Special emphasis is given to the study of high multiplicityevents containing more than 100 reconstructed muons. It is shown that such highmultiplicity events demand primary cosmic rays with energy above 10 16 eV, andthat the frequency of these events can be successfully described by assuming aheavy mass composition of primary cosmic rays in this energy range, and usingthe most recent interaction models to describe the development of the air showerresulting from the primary interaction. 131

Web-Page: http://inspirehep.net/record/1642527/files/1641483_131-138.pdf

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