Early results of the LHCf Experiment and their contribution to Ultra-High-Energy Cosmic Ray Physics

O. Adriani , L. Bonechi , M. Bongi , G. Castellini , R. D'Alessandro , A. Faus , K. Fukatsu , M. Haguenauer

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Y. Itow K. Kasahara D. Macina T. Mase K. Masuda Y. Matsubara H. Menjo G. Mitsuka Y. Muraki M. Nakai K. Noda P. Papini A L. Perrot S. Ricciarini T. Sako K. Suzuki T. Suzuki Y. Shimizu K. Taki T. Tamura S. Torii A. Tricomi J. Velasco W. C. Turner K. Yoshida

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classification ✦ hep-ex

keywords experimentlhcfdataemittedforwardphysicsregionresults

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LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. The LHCf experiment acquired data from April to July 2010 during commissioning time of LHC operations at low luminosity. Production spectra of photons and neutrons emitted in the very forward region ($\eta>$ 8.4) have been obtained. In this paper preliminary results of the photon spectra taken at $\sqrt{s}$ = 7TeV are reported.

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Early results of the LHCf Experiment and their contribution to Ultra-High-Energy Cosmic Ray Physics

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