12-18 June 2016
Lund University
Europe/Zurich timezone

Measurements of very forward particles production spectra at LHC: the LHCf experiment

Not scheduled
Lund University

Lund University

Sandgatan 2, Lund, Sweden
Poster LHC experiments: performance and potential Poster Session


Eugenio Berti (Universita e INFN, Firenze (IT))


The main aim of the LHC forward (LHCf) experiment is to provide precise measurements of the
particles production spectra in the forward region. These calibration data are very important for the tuning of hadronic interaction models used by ground-based cosmic rays experiments. LHC is the most suitable place where we can perform these measurements because proton-proton collisions at $\sqrt{s}$ = 14 TeV is equivalent to the interaction of a $10^{17}$ eV cosmic ray with the atmosphere. In order to do that, LHCf makes use of two small sampling calorimeters installed at ±140m from LHC IP1, so that it can detect neutral particles produced by p-p collisions having pseudo-rapidity $\eta$ > 8.4.
In the past years LHCf acquired data from p-p collisions at different energies ($\sqrt{s}$ = 0.9 TeV, 2.76 TeV, 7 TeV and 13 TeV) and from p-Pb collisions ($\sqrt{s_{NN}}$ = 5.02 TeV). In this talk, we would like to present the analysis results published by the collaboration, relative to neutrons, photons and $\pi^{0}$ production spectra, compared with models predictions. In particular we will discuss about $\pi^{0}$, the best probe LHCf can use to study forward physics, which offers the possibility to study $p_{T}$ and $p_{z}$ spectra, to test Feynman scaling hypothesis and to estimate the nuclear modification factor. Finally, preliminary results relative to photon energy spectra at $\sqrt{s}$ = 13 TeV will be presented.

Primary author

Eugenio Berti (Universita e INFN, Firenze (IT))


Alessio Tiberio (Universita e INFN, Firenze (IT)) Eri Matsubayashi (Nagoya University (JP)) Guido Castellini (Dipartimento di Fisica) Hiroaki Menjo (Nagoya University (JP)) Katsuaki Kasahara (Waseda University (JP)) Lel D'Alessandro (Universita e INFN, Firenze (IT)) Lorenzo Bonechi (Universita e INFN, Firenze (IT)) Mana Ueno (Nagoya University (JP)) Massimo Bongi (Universita e INFN, Firenze (IT)) Nobuyuki Sakurai (Nagoya University (JP)) Oscar Adriani (Universita e INFN, Firenze (IT)) Paolo Papini (INFN) Qidong Zhou (Nagoya University (JP)) Sergio Bruno Ricciarini (Universita e INFN, Firenze (IT)) Shoji Torii (Waseda University (JP)) Tadahisa Tamura (Kanagawa University (JP)) Taiki Iwata (Waseda University (JP)) Takashi Sako (Nagoya University (JP)) Takuya Suzuki (Waseda University (JP)) Yasushi Muraki (STE-laboratory, Nagoya University (JP)) Yoshitaka Ito (Nagoya University (JP)) Yuya Makino (Nagoya University (JP))

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