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July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Status of the LHCf experiment

Jul 30, 2015, 11:00 AM
Yangtze 2 (World Forum)

Yangtze 2

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX Parallel CR02 Hadr Int


Yoshitaka Ito (Nagoya University (JP))


Observations of UHECRs' by extensive air showers rely on understanding of hadron interactions at very high energies. Recent LHC experiments have provided useful hadron interaction data at the collision energy which is almost equivalent to 10**17 eV in the laboratory frame. Among them, the LHCf experiment is dedicated measurement of neutral particle productions at very forward region of LHC IP1. Two detectors consisting of a pair of compact electromagnetic sampling calorimeters installed at 140 m apart from the IP1, covering the pseudorapidity range eta from 8.6 to infinity. So far measurements of energy spectra for gamma rays, neutral pions, and neutrons have been measured for 7TeV or 0.9 TeV p-p collisions. LHCf has also reported neutral pions from p-Pb collisions at root sNN = 5.02 TeV. Obtained results are compared with the existing cosmic ray interaction models, SYBILL, QGSJETII, DPMJET3, and EPOS. The measured data are well bracketed by these models, although none of them could completely reproduce the data. In 2015 LHCf revisits LHC to obtain p-p collision data at 13 TeV. Current achievement of LHCf experiment and the first look of 13 TeV data as well as future prospects for possible very forward measurement for p-p or p-light ions at RHIC or future LHC will be presented.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 226

Primary author

Yoshitaka Ito (Nagoya University (JP))


Alessia Tricomi (Universita e INFN, Catania (IT)) Gaku Mitsuka (Universita e INFN, Firenze (IT)) Hiroaki Menjo (Nagoya University (JP)) Oscar Adriani (Dipartimento di Fisica) Takashi Sako (Nagoya University (JP))

Presentation materials