New facts about muon production in Extended Air Shower simulations

Details New facts about muon production in Extended Air Shower simulations New facts about muon production in Extended Air Shower simulations

2006-11-09

arxiv.org/abs/astro-ph/0611311v1

Phys.Rev.Lett.101:171101,2008

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1103/PhysRevLett.101.171101

Whereas air shower simulations are very valuable tools for interpreting cosmic ray data, there is a long standing problem: is seems to be impossible to accommodate at the same time the longitudinal development of air showers and the number of muons measured at ground. Using a new hadronic interaction model (EPOS) in air shower simulations produces considerably more muons, in agreement with results from the HiRes-MIA experiment. We find that this is mainly due to a better description of baryon-antibaryon production in hadronic interactions. This is a new aspect of air shower physics which has never been considered so far.

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