LHCf Experiment: Physics Results

M. Bongi*, O. Adriani, E. Berti, L. Bonechi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, Y. Matsubara, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, Y. OkunoP. Papini, A. L. Perrot, S. Ricciarini, T. Sako, N. Sakurai, Y. Shimizu, Y. Sugiura, T. Suzuki, T. Tamura, A. Tiberio, Shoji Torii, A. Tricomi, W. C. Turner, M. Ueno, K. Yoshida, Q. D. Zhou

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    LHCf is an experiment designed to study the forward emission of neutral particles produced in proton-proton and proton-nucleus collisions at the LHC. The detectors consists of a pair of electromagnetic sampling calorimeters installed on both sides of the ATLAS interaction point IP1 at a distance of 140 m, covering the pseudorapidity range from 8.4 to infinity. The experiment has successfully measured the energy spectra of gamma rays, neutral pions and neutrons in p-p collisions at 0.9 TeV and 7 TeV, and of neutral pions in p-Pb collisions at 5.02 TeV and in p-p collisions at 2.76 TeV. The most recent data set has been acquired during a special physics run of p-p collisions at 13 TeV in June 2015 after the restart of the LHC. This set of measurements represent an useful contribution to the calibration and tuning of the hadronic interaction models used for the simulation of atmospheric showers induced by very-high energy cosmic rays, as the measured energy interval corresponds to the range 1014 - 1017 eV in the laboratory frame.

    Original languageEnglish
    Pages (from-to)125-129
    Number of pages5
    JournalNuclear and Particle Physics Proceedings
    Publication statusPublished - 2016 Oct 1


    • Hadronic interaction models
    • LHC
    • Ultra-high energy cosmic-ray

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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