Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-10-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 6 figures, Presented (contribution 738) to the 31st ICRC, Lodz, Poland, 2009
Scientific paper
In this paper parametric formulas are presented to evaluate the flux of atmospheric muons in the range of vertical depth between 1.5 to 5 km of water equivalent (km w.e.) and up to 85^o for the zenith angle. We take into account their arrival in bundles with different muon multiplicities. The energy of muons inside bundles is then computed considering the muon distance from the bundle axis. This parameterisation relies on a full Monte Carlo simulation of primary Cosmic Ray (CR) interactions, shower propagation in the atmosphere and muon transport in deep water [1]. The primary CR flux and interaction models, in the range in which they can produce muons which may reach 1.5 km w.e., suffer from large experimental uncertainties. We used a primary CR flux and an interaction model able to correctly reproduce the flux, the multiplicity distribution, the spatial distance between muons as measured by the underground MACRO experiment.
Bazzotti Marco
Biagi Simone
Carminati G.
Cecchini Simone
Chiarusi Tommaso
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