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Speical HEP: Measurements of forward particle production at colliders to understand cosmic-ray air showers

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Sako Takashi, Nagoya University
When
11 December 2015 from 3:00 PM to 4:00 PM
Where
339 Davey Laboratory
Contact Name
Kohta Murase
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High-energy cosmic rays above 10^15eV are observed through atmospheric air shower phenomenon. In the interpretation of observed data, we must rely on the Monte Carlo simulation of the air shower development, where we assume hadronic interaction.  In the hadronic interactions, a large fraction of energy is carried by particles emitted forward direction and theoretical calculation of such cross section is difficult because of its non-perturvative nature. To test forward particle production at high-energy hadron collisions, we carry out an experiment Large Hadron Collider forward (LHCf).  We measure neutral particle (photons, neutrons and pi0) production at LHC in pseudo-rapidity above 8.4 (<450urad).
LHCf has so far published particle cross sections measured at 0.9, 2.76 and 7TeV proton-proton collisions and 5 TeV proton-Lead collisions.   In this seminar, major results obtained from the 7TeV p-p data are presented together with a brief introduction to the recent cosmic-ray observations and LHCf experiment. Analysis status and prospects from the 13TeV data obtained in this year and future plan of low energy experiment at RHIC in BNL are also presented.

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