Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-02
Nucl.Phys.Proc.Suppl.175-176:346-349,2008
Astronomy and Astrophysics
Astrophysics
4 pages, presented at the XIV International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2006), WeiHai, Chi
Scientific paper
10.1016/j.nuclphysbps.2007.11.02
Most cosmic-ray air shower arrays have focused on detecting electromagnetic shower particles and low energy muons. A few groups (most notably MACRO + EASTOP and SPASE + AMANDA) have studied the high energy muon component of showers. However, these experiments had small solid angles, and did not study muons far from the core. The IceTop + IceCube combination, with its 1 km$^2$ muon detection area can study muons far from the shower core. IceCube can measure their energy loss ($dE/dx$), and hence their energy. With the energy, and the known distribution of production heights, the transverse momentum ($p_T$) spectrum of high $p_T$ muons can be determined. The production of these muons is calculable in perturbative QCD, so the measured muon spectra can be used to probe the composition of incident cosmic-rays.
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