HEP@VUB meetings (2 February 2017) · IIHE Indico

HEP@VUB meetings

Thursday, 2 February 2017 - 12:00

Monday, 30 January 2017
Tuesday, 31 January 2017
Wednesday, 1 February 2017
Thursday, 2 February 2017
12:00 Muons from air showers - Olaf Scholten
Muons from air showers
- Olaf Scholten
12:00 - 13:00
Room: Jean Sacton seminar room (1G003) An ultra-high energy cosmic ray that enters the atmosphere of the Earth collides with air molecules to create an extensive air shower, a particle cascade with millions of particles. At the highest energies the center-of-mass energy of the initial collision exceeds LHC energies by an order of magnitude. To determine the mass of the cosmic ray the measured properties of the air shower are compared with model calculations. The parameters in these models are optimized to reproduce the recent LHC data. Since many years a large (factor 2) discrepancy is observed between data and simulation. Recently it was proven by the Pierre Auger Collaboration that the reason for the discrepancy is an under estimate of the number of produced muons. In my presentation I will present this evidence and discuss implications for modeling at ultra-high energies as well as future plans improving the data.

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