Study of multi-muon bundles in cosmic ray showers detected with the DELPHI detector at LEP

Abstract

The DELPHI detector at LEP has been used to measure multi-muon bundles originating from cosmic ray interactions with air. The cosmic events were recorded in ``parasitic mode'' between individual e+e- interactions and the total live time of this data taking is equivalent to 1.6x10^6 seconds. The DELPHI apparatus is located about 100 metres underground and the 84 metres rock overburden imposes a cut-off of about 52 GeV/c on muon momenta. The data from the large volume Hadron Calorimeter allowed the muon multiplicity of 54201 events to be reconstructed. The resulting muon multiplicity distribution is compared with the prediction of the Monte Carlo simulation based on CORSIKA/QGSJET01. The model fails to describe the abundance of high multiplicity events. The impact of QGSJET internal parameters on the results is also studied.

arXiv comment22 pages, 17 figures, Accepted by Astropart. Phys

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• Status and initial physics performance studies of the MPD experiment at NICA
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• Study of cosmic ray events with high muon multiplicity using the ALICE detector at the CERN Large Hadron Collider
• Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period
• Submarine neutrino communication
• Muon bundles as a sign of strangelets from the Universe
• The rise of muon content in extensive air showers after the 3 PeV knee of the primary cosmic ray spectrum according to data of the Tien Shan mountain installation
• Multimuons in cosmic-ray events as seen in ALICE at the LHC
• Study of Particle Multiplicity of Cosmic Ray Events using 2m$\times$2m Resistive Plate Chamber Stack at IICHEP-Madurai
• Soft Particle Production in Very High Energy Hadron Interactions
• Effects of massive photons from the dark sector on the muon content in extensive air showers
• Cosmophysical aspects of relativistic nuclear fragmentation
• Muon Excess in Cosmic Rays and at CDF: Signs for a Hidden Sector?
• New detectors of the Experimental complex NEVOD for multicomponent EAS detection
• Experimental Summary: Very High Energy Cosmic Rays and their Interactions
• Soft Particle Production in Cosmic Ray Showers