Due to technical problems on the CERN SSO system, logging in is currently failing intermittently.
Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

The LHCf experiment to verify UHECR interactions at LHC

Jul 7, 2012, 3:00 PM
Room 216 (Melbourne Convention and Exhibition Centre)

Room 216

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 11. Particle Astrophysics and Cosmology Room 216 - Particle Astrophysics and Cosmology -TR11


Prof. Yoshitaka Ito (Nagoya University (JP))


The LHCf experiment has performed dedicated measurement of neutral particles in the very forward of LHC p-p collisions. The results in inclusive single photon spectra at 7TeV and 900GeV p-p collisions, and the pi0 transverse spectra at 7TeV p-p are presented with comparison of various hadron interaction models used for UHECR shower simulations. Also prospects in the 2012 p-Pb runs at LHC and possible future A-A runs are discussed.


The single photon spectra at 7TeV and 900GeV p-p collisions are compared with various cosmic ray interaction models such as QGSJET-II, DPMJET3, SYBILL, EPOS and PYTHIA in the very forward. The results show most of models predict too hard spectra. Similarly pi0 PT spectra in the very forward region are compared and we found EPOS shows pretty good agreement. These results will be soon feedback to UHECR experiments to refine their MC.

Primary author

Prof. Yoshitaka Ito (Nagoya University (JP))


Alessia Tricomi (Universita e INFN (IT)) Anne-Laure Perrot (CERN) Gaku Mitsuka (Nagoya University (JP)) Hiroaki Menjo (Nagoya University (JP)) Katsuaki Kasahara (Waseda University (JP)) Koji Noda (Universita e INFN (IT)) Lel D'Alessandro (Universita e INFN (IT)) Lorenzo Bonechi (Istituto Nazionale di Fisica Nucleare (INFN)) Massimo Bongi (Universita & INFN, Firenze) Oscar Adriani (Dipartimento di Fisica) Shoji Torii (Waseda University (JP)) Takashi Sako (Nagoya University (JP)) Yasushi Muraki (Konan University)

Presentation materials