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Title: The LHCf experiment

Abstract

The Large Hadron Collider forward (LHCf) experiment has performed measurements of the neutral particles emitted to the very forward region of proton-proton collisions at LHC. This experiment is designed to explore very forward interaction at very high energy, which is relevant to interpretation of the data from cosmic-ray experiments. LHCf detector is well optimized to measure photons in the multi-TeV energy range, and to reconstruct neutral pions with two photons. It can also measure neutrons. The data acquisitions at 0.9 TeV and 7 TeV were completed in 2010. In this paper, single photon energy spectra obtained at 0.9 TeV and transverse energy spectra of neutral pions obtained at 7 TeV will be presented. The results are compared with expectations by hadronic interaction models used for air-shower simulations. We found none of these models agree with the obtained data in the photon energy spectra, while EPOS shows a good agreement in the transverse energy spectra of neural pions. Impacts on cosmic-ray and QCD physics are also discussed.

Authors:
 [1];
  1. INFN Section of Catania, Via S. Sofia 64, Catania (Italy)
Publication Date:
OSTI Identifier:
22075663
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1492; Journal Issue: 1; Conference: QCD-WORK 2012: International workshop on quantum chromodynamics: Theory and experiment, Lecce (Italy), 18-21 Jun 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; COMPUTERIZED SIMULATION; COSMIC RADIATION; DATA ACQUISITION; ENERGY SPECTRA; INCLUSIVE INTERACTIONS; NEUTRAL PARTICLES; NEUTRONS; PHOTONS; PIONS NEUTRAL; PROTON-PROTON INTERACTIONS; QUANTUM CHROMODYNAMICS; TEV RANGE; TRANSVERSE ENERGY

Citation Formats

Noda, Koji, and Collaboration: LHCf Collaboration. The LHCf experiment. United States: N. p., 2012. Web. doi:10.1063/1.4763514.
Noda, Koji, & Collaboration: LHCf Collaboration. The LHCf experiment. United States. doi:10.1063/1.4763514.
Noda, Koji, and Collaboration: LHCf Collaboration. Tue . "The LHCf experiment". United States. doi:10.1063/1.4763514.
@article{osti_22075663,
title = {The LHCf experiment},
author = {Noda, Koji and Collaboration: LHCf Collaboration},
abstractNote = {The Large Hadron Collider forward (LHCf) experiment has performed measurements of the neutral particles emitted to the very forward region of proton-proton collisions at LHC. This experiment is designed to explore very forward interaction at very high energy, which is relevant to interpretation of the data from cosmic-ray experiments. LHCf detector is well optimized to measure photons in the multi-TeV energy range, and to reconstruct neutral pions with two photons. It can also measure neutrons. The data acquisitions at 0.9 TeV and 7 TeV were completed in 2010. In this paper, single photon energy spectra obtained at 0.9 TeV and transverse energy spectra of neutral pions obtained at 7 TeV will be presented. The results are compared with expectations by hadronic interaction models used for air-shower simulations. We found none of these models agree with the obtained data in the photon energy spectra, while EPOS shows a good agreement in the transverse energy spectra of neural pions. Impacts on cosmic-ray and QCD physics are also discussed.},
doi = {10.1063/1.4763514},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1492,
place = {United States},
year = {2012},
month = {10}
}