Abstract
In this talk we present a possible explanation of the presence of high muon multiplicity events registered recenty by CERN ALICE experiment in its dedicated cosmic ray run.
Highlights
A very important aspect of understanding of primary cosmic ray flux and its composition is a proper description of recent measurement done by the ALICE experiment at CERN LHC, in its dedicated cosmic ray run [1]
The muon multiplicity distribution measured by ALICE when compared with the fits obtained from CORSIKA simulations with proton or iron primary cosmic rays indicates that the expected rate of higher multiplicity muon events is sensitive to assumptions made about the dominant hadronic production mechanisms in air shower development
We demonstrate that extremely large groups of muons can be very well described by a relatively minute admixture of Strange Quark Matter (SQM) of the same total energy
Summary
A very important aspect of understanding of primary cosmic ray flux and its composition is a proper description of recent measurement done by the ALICE experiment at CERN LHC, in its dedicated cosmic ray run [1]. Similar events have been studied in previous underground experiments such as ALEPH [2], DELPHI [3] and L3 [4] at CERN Large Electron-Positron Collider While these experiments were able to reproduce the measured muon multiplicity distribution with Monte Carlo simulations at low and intermediate multiplicities, their simulations failed to describe the frequency of the highest multiplicity events. The ALICE Collaboration shows in [1] only fits for muon multiplicities up to about 70, neglecting many events with measured muon multiplicities up to 270 In this talk we discuss the hypothesis that muon bundles of extremely high multiplicity observed recently by ALICE detector can originate from small lumps of Strange Quark Matter (SQM) colliding with the atmosphere. Our estimate of SQM flux do not contradict results obtained recently by the SLIM Collaboration [5]
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