Measurement at very forward in LHC p-p collisions for ultra high energy cosmic rays

2010 Fiscal Year Final Research Report

• Project/Area Number: 20403004
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: ITOW Yoshitaka Nagoya University, 太陽地球環境研究所, 教授 (50272521)
• Co-Investigator(Kenkyū-buntansha): MASUDA Kimiaki 名古屋大学, 太陽地球環境研究所, 准教授 (40173744) ; SAKO Takashi 名古屋大学, 太陽地球環境研究所, 助教 (90324368)
• Co-Investigator(Renkei-kenkyūsha): MENJO Hiroaki 名古屋大学, 素粒子宇宙起源研究機構現象解析センター, 特任助教 (10447849) ; MITSUKA Gaku 名古屋大学, 太陽地球環境研究所, GCOE研究員 (00566804)
• Project Period (FY): 2008 – 2010
• Keywords: 宇宙線 / 素粒子実験 / 加速器 / 実験核物理 / 国際協力

Research Abstract

We have carried out the LHCf experiment for measurement of neutral partciles at 0 degree of proton-proton collisions in LHC at 0.9TeV and 7TeV in CMS energy in 2009-2010, which is relevant to air shower development of very high energy cosmic rays. We have reported the first result of experiment for the data of gamma ray energy spectra at 0 degree of 7TeV proton-proton collisions compared with various hadron interaction models relevant to air showers. As the result data looks incompatible with any of existing hadron interaction models completely and suggest possible impact on implication of air shower development.

Research Products

• [Journal Article] Monte Carlo Study of forward pi0 production spectra to be measured by the LHCf experiment for the purpose of benchmarking hadron interaction models at 10^17 eV (2011)
  • Author(s): H.Menjo, Y.Itow, K.Masuda, G.Mitsuka, T.Sako, (他9人)
  • Journal Title: Astroparticle Phys. 34 Pages: 513-520
  • Peer Reviewed
• [Journal Article] The LHCf detector at the CERN Large Hadron Collider (2008)
  • Author(s): O.Adriani, Y.Itow, K.Masuda, H.Menjo, T.Sako
  • Journal Title: Jounal of Instrumentation 3:LS08006 Pages: 39
  • Peer Reviewed
• [Journal Article] Production and test of the LHCf microstrip silicon system (2008)
  • Author(s): L.Bonechi, Y.Itow, K.Masuda, T.Sako
  • Journal Title: Nucl.Instr.Meth A 596 Pages: 85-87
• [Journal Article] The first year results of the LHCf experiment to verify cosmic ray interaction models at LHC energy. (2008)
  • Author(s): Y.Itow
  • Journal Title: Prog.Theor.Phys.Suppl. 187 Pages: 273-280
  • Peer Reviewed
• [Journal Article] The LHCf experiment : Verification of interaction models of cosmic rays at 10**17eV. (2008)
  • Author(s): Y.Itow
  • Journal Title: J.Phys.Conf.Ser. 120:062028
• [Journal Article] Verification of hadron interaction models of cosmic rays at 10**17 eV by the LHCf experiment. (2008)
  • Author(s): Y.Itow
  • Journal Title: AIP Conf.Proc. 1040 Pages: 206-210
• [Presentation] First Results of LHCf : Very Forward Particles at LHC Collision (2010)
  • Author(s): さこ隆志
  • Organizer: ICATPP Conference on Cosmic Rays for Particle and Astroparticle Physics
  • Place of Presentation: Como Italy(招待)
  • Year and Date: 20101007-20101008
• [Presentation] First results from the LHCf experiment (2010)
  • Author(s): 伊藤好孝
  • Organizer: High Energy Strong Interaction (HESI2010)
  • Place of Presentation: YITP Kyoyo Univ(招待)
  • Year and Date: 20100810-20100813
• [Presentation] LHCf Measurements of Very Forward Particles at LHC (2010)
  • Author(s): さこ隆志
  • Organizer: VI International Symposium on Very High Energy Cosmic Ray Interaction
  • Place of Presentation: Fermi Lab(USA)(招待)
  • Year and Date: 20100628-20100712
• [Presentation] The LHCf experiment: From cosmic rays to hadron physics (2009)
  • Author(s): 伊藤好孝
  • Organizer: KEK Theory Center Cosmophysics Group Workshop on High Energy Astrophysics (HEAP09)
  • Place of Presentation: KEK(招待)
  • Year and Date: 20091110-20091112
• [Presentation] LHCf実験 (2008)
  • Author(s): さこ隆志
  • Organizer: 超高エネルギー宇宙線とハドロン構造2008
  • Place of Presentation: KEK(招待)
  • Year and Date: 20080425-20080426
• [Presentation] LHCでの超前方測定:LHCf実験 (2008)
  • Author(s): 伊藤好孝
  • Organizer: 宇宙線・宇宙物理領域・実験各物理領域、理論核物理領域合同シンポジウム、超高エネルギー宇宙線とハドロン構造、物理学会
  • Place of Presentation: 山形大(招待)
  • Year and Date: 20080000
• [Remarks] ホームページ等
  • URL: http://www.stelab.nagoya-u.ac.jp/LHCfhttp://hep.fi.infn.it/LHCf/index.html