HEP@VUB meetings

Thursday 2 Feb 2017, 12:00 → 13:00 Europe/Brussels

Jean Sacton seminar room (1G003) (Universe)

Jean Sacton seminar room (1G003)

Universe

Description

Speaker: Olaf Scholten

Participants

Alberto Mariotti
Alexander Sevrin
Aritra Ghosh
Catherine De Clercq
Catherine De Clercq
Christoph Raab
Denys Lontkovskyi
Dries Coone
Isabelle De Bruyn
Isis Van Parijs
Jonathan Lindgren
Katie Mulrey
Krijn de Vries
Kévin Nguyen
Leonidas Kalousis
Lieselotte Moreels
Matthias Vereecken
Nick van Eijndhoven
Pascal Vanlaer
PRAGATI MITRA
Seth Moortgat
Shimaa Abu Zeid
Tobias Winchen
Vincent Luyten

- 12:00 → 13:00
  
  Muons from air showers 1h
  
  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.
  
  Speaker: Olaf Scholten