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Abstract:
At a depth of > 1450m of rock only muon- and neutrino -events are
observed.
The muons have a mean energy of 300 GeV and generate dominantly
electromagnetic events, pair production, bremsstrahlung and elastic
electron scattering. At a smaller rate also hadronic events are
produced, by virtuell photons at very small Q*2. Multimuons occur with a
few % rate and some muons range out in the detector. The muon event
characteristics will be described in detail. Since the muon energy
spectrum is rather independent of depth similar muon events are expected
at detectors much nearer to the surface, like at LEP. In addition a
brief account of neutrino events will be given.
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