Study on very forward particle productions and their Feynman scaling in 13TeV p-p collisions at LHC

2017 Fiscal Year Annual Research Report

• Project/Area Number: 26247037
• Research Institution: Nagoya University
• Principal Investigator: 伊藤 好孝 名古屋大学, 宇宙地球環境研究所, 教授 (50272521)
• Co-Investigator(Kenkyū-buntansha): さこ 隆志 名古屋大学, 宇宙地球環境研究所, 講師 (90324368) ; 毛受 弘彰 名古屋大学, 宇宙地球環境研究所, 助教 (10447849) ; 増田 公明 名古屋大学, 宇宙地球環境研究所, 准教授 (40173744)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 宇宙線 / 加速器実験 / 国際協力 / 実験核物理 / 素粒子実験 / 国際研究者交流 / ラージハドロンコライダー / CERN

Outline of Annual Research Achievements

LHCf13TeV陽子陽子衝突データの解析を進め、これまでで最も高い衝突エネルギーでの宇宙線ハドロン相互作用モデルの検証を行った。前年度の超前方ガンマ線測定に続き、今年度は超前方生成中性子スペクトルの最終結果を導出した。得られたファイマンXfスペクトルは、LHCf7TeVおよびまた200GeVRHICデータと矛盾なく、ファイマンスケーリングがよく成り立っていることを示唆している。また、ATLAS実験との連動解析により、ATLAS中央検出器の飛跡情報を用いて、陽子陽子衝突を回折的散乱、非回折的散乱に選別し、各々からの超前方生成ガンマ線スペクトルを明らかにし、陽子陽子衝突のモードに分けて超前方粒子生成を検証することに成功した。これらのデータを用いて改良された宇宙線ハドロン相互作用モデルSYBILL3.0cを用いて、空気シャワー発達の違いを検討し、回折的散乱の不定性がシャワー最大発達高度に与える影響について考察した。
RHICf実験については、2017年6月21-26日に取得に成功した510GeV偏極陽子陽子衝突データの初期解析を進め、
衝突エネルギー510GeVにおける超前方ガンマ線スペクトル導出に向けての準備を行うと共に、これまで想定していなかった超前方中性パイ中間子における横非対称性を発見した。
これらの成果を世界に発信し、専門家と議論を行うため、2017年9月26-29日に国際研究会Forward Physics and High Energy Scattering at Zero Degree 2017を、2018年5月21-25日に国際会議20th International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI2018)を、どちらも名古屋大学において開催した。

Research Progress Status

平成29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成29年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] フィレンチェ大学/カタニア大学(イタリア)
  • Country Name: ITALY
  • Counterpart Institution: フィレンチェ大学/カタニア大学
• [Int'l Joint Research] エコール・ポリテクニク(フランス)
  • Country Name: FRANCE
  • Counterpart Institution: エコール・ポリテクニク
• [Int'l Joint Research] ローレンス・バークレー研究所(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: ローレンス・バークレー研究所
• [Int'l Joint Research] ソウル大学/コレア大学(韓国)
  • Country Name: KOREA (REP. OF KOREA)
  • Counterpart Institution: ソウル大学/コレア大学
• [Journal Article] Measurement of inclusive forward neutron production cross section in proton-proton collisions at s=13$$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector (2018)
  • Author(s): Adriani O.、Berti E.、Bonechi L.、Bongi M.、D’Alessandro R.、Detti S.、Haguenauer M.、Itow Y.、Kasahara K.、Makino Y.、Masuda K.、Menjo H.、Muraki Y.、Ohashi K.、Papini P.、Ricciarini S.、Sako T.、 et al.
  • Journal Title: Journal of High Energy Physics Volume: 1811 Pages: 073
  • DOI: 10.1007/JHEP11(2018)073
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Monte Carlo Study of Diffraction in Proton?Proton Collisions at \(\sqrt{s} \) = 13?TeV with the Very Forward Detector (2018)
  • Author(s): Zhou Qi-Dong、Itow Yoshitaka、Sako Takashi、Menjo Hiroaki
  • Journal Title: JPS Conference Proceedings Volume: 19 Pages: 011041
  • DOI: 10.7566/JPSCP.19.011041
  • Int'l Joint Research
• [Journal Article] The Resent Results from the LHCf Experiment (2018)
  • Author(s): Menjo Hiroaki、Adriani Oscar、Berti Eugenio、Bonechi Lorenzo、Bongi Massimo、Castellini Guido、D’Alessandro Raffaello、Haguenauer Maurice、Itow Yoshitaka、Iwata Taishi、Kasahara Katsuaki、Makino Yuya、Masuda Kimiaki、Matsubara Yutaka、Matsubayashi Eri、Muraki Yasushi、Sako Takashi et al.
  • Journal Title: JPS Conference Proceeding 19 (2018) 011017 Volume: 19 Pages: 011017
  • DOI: 10.7566/JPSCP.19.011017
  • Int'l Joint Research
• [Journal Article] Measurement of very forward particle production at RHIC with √s=510 GeV proton-proton collisions (2018)
  • Author(s): Sako Takashi、Itow Yoshitaka、Zhou Qigong D.、Ueno Mana、Shinoda Maiko、Sato Kenta、Menjo Hiroaki、Nakagawa Itaru、Seidl Ralf、Kim M.H.、Tanida Kiyoshi、Torii S.、Kasahara Katsuaki、Suzuki T.、Sakurai Nobuyuki、Adriani Oscar、D’Alessandro R.、Bonechi Lorenzo、Berti Eugenio、Tricomi Alessia、GOTO Yuji、Park J.S.
  • Journal Title: Proceeding of Science ICRC2017 (2018) 337 Volume: 301 Pages: 337
  • DOI: 10.22323/1.301.0337
  • Int'l Joint Research
• [Journal Article] Status of the LHCf experiment (2018)
  • Author(s): Menjo Hiroaki、Adriani Oscar、Berti Eugenio、Bonechi Lorenzo、Bongi Massimo、Castellini Guido、D'Alessandro R.、Haguenauer Maurice、Itow Yoshitaka、Kasahara Katsuaki、Masuda Kimiaki、Matsubara Yutaka、Muraki Yasushi、Papini P.、Ricciarini Sergio B.、Sako Takashi、et al.
  • Journal Title: Proceeding of Science ICRC2017 (2018) 1099 Volume: 301 Pages: 1099
  • DOI: 10.22323/1.301.1099
  • Int'l Joint Research
• [Journal Article] Measurement of forward photon production cross-section in proton?proton collisions ats=13TeVwith the LHCf detector (2018)
  • Author(s): Adriani O.、Berti E.、Bonechi L.、Bongi M.、D'Alessandro R.、Haguenauer M.、Itow Y.、Iwata T.、Kasahara K.、Makino Y.、Masuda K.、Matsubayashi E.、Menjo H.、Muraki Y.、Papini P.、Ricciarini S.、Sako T.、Sakurai N.、Shinoda M.、Suzuki T.、Tamura T.、Tiberio A.、Torii S.、Tricomi A.、Turner W.C.、Ueno M.、Zhou Q.D.
  • Journal Title: Physics Letters B Volume: 780 Pages: 233～239
  • DOI: 10.1016/j.physletb.2017.12.050
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] RHIC forward experiment to study √s dependence of forward particle production (2017)
  • Author(s): Sako T.、Adriani O.、Bonechi L.、D'Alessandro R.、Goto Y.、Itow Y.、Kasahara K.、Kim M.、Makino Y.、Matsubayashi E.、Menjo H.、Nakagawa I.、Park J.、Sakurai N.、Sato K.、Seidl R.、Shinoda M.、Suzuki T.、Tanida K.、Torii S.、Tricomi A.、Ueno M.、Zhou Q.D.
  • Journal Title: EPJ Web of Conferences Volume: 145 Pages: 10005～10005
  • DOI: 10.1051/epjconf/201614510005
  • Int'l Joint Research
• [Journal Article] Results of the LHCf experiment and the forward measurements at the LHC (2017)
  • Author(s): Sako T.、Adriani O.、Berti E.、Bonechi L.、Bongi M.、Castellini G.、D'Alessandro R.、Haguenauer M.、Itow Y.、Iwata T.、Kasahara K.、Masuda K.、Matsubayashi E.、Menjo H.、 et al.
  • Journal Title: EPJ Web of Conferences Volume: 145 Pages: 09002～09002
  • DOI: 10.1051/epjconf/201614509002
  • Int'l Joint Research
• [Journal Article] Recent Results from the LHCf Experiment (2017)
  • Author(s): Menjo H.、Adriani O.、Berti E.、Bonechi L.、Bongi M.、Castellini G.、D’Alessandro R.、Del Prete M.、Haguenauer M.、Itow Y.、Kasahara K.、Kawade K.、Makino Y.、Masuda K.、Matsubayashi E.、Mitsuka G.、Muraki Y.、Papini P.、Perrot A.-L.、Pfeiffer D.、Ricciarini S.、Sako T. et al,
  • Journal Title: JPS Conference Proceeding 15 (2017) 011001 Volume: 15 Pages: 011001
  • DOI: 10.7566/JPSCP.15.011001
  • Int'l Joint Research
• [Journal Article] Measurements of very forward particles production spectra at LHC: the LHCf experiment (2017)
  • Author(s): Berti Eugenio、Adriani Oscar、Bonechi Lorenzo、Bongi Massimo、Castellini Guido、D’Alessandro Raffaello、Haguenauer Maurice、Itow Yoshitaka、Iwata Taiki、Kasahara Katsuaki、MAKINO Yuya、Masuda Kimiaki、Matsubayashi Eri、Menjo Hiroaki、Muraki Yasushi、Papini Paolo、Ricciarini Sergio、Sako Takashi、et al.
  • Journal Title: Proceeding of Science LHCP2016 (2017) 195 Volume: 276 Pages: 195
  • DOI: 10.22323/1.276.0195
  • Int'l Joint Research
• [Journal Article] Performance study for the photon measurements of the upgraded LHCf calorimeters with Gd2SiO5(GSO) scintillators (2017)
  • Author(s): Makino Y.、Tiberio A.、Adriani O.、Berti E.、Bonechi L.、Bongi M.、Caccia Z.、D'Alessandro R.、Prete M. Del、Detti S.、Haguenauer M.、Itow Y.、Iwata T.、Kasahara K.、Masuda K.、Matsubayashi E.、Menjo H.、Mitsuka G.、Muraki Y.、Papini P.、Ricciarini S.、Sako T.、et al.
  • Journal Title: Journal of Instrumentation Volume: 12 Pages: P03023～P03023
  • DOI: 10.1088/1748-0221/12/03/P03023
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The performance for the TeV photon measurement of the LHCf upgraded detector using Gd2SiO5 (GSO) scintillators (2017)
  • Author(s): Makino Y.、Adriani O.、Berti E.、Bonechi L.、Bongi M.、Castellini G.、D'Alessandro R.、Haguenauer M.、Itow Y.、Iwata T.、Kasahara K.、Masuda K.、Matsubayashi E.、Menjo H.、Muraki Y.、Papini P.、Ricciarini S.、Sako T.、Suzuki T.、Tamura T.、Tiberio A.、Torii S.、Tricomi A.、Turner W.C.、Ueno M.、Zhou Q.D.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 845 Pages: 490～493
  • DOI: 10.1016/j.nima.2016.04.074
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The LHCf experiment: Forward particles production spectra at LHC (2017)
  • Author(s): E. Berti, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Haguenauer, Y. Itow, Y. Iwata, K. Kasahara, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, Y. Muraki, P. Papini, S. Ricciarini, T. Sako, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou
  • Journal Title: Il Nuovo Cimento C Volume: 1 Pages: 17013
  • DOI: 10.1393/ncc/i2017-17013-x
  • Int'l Joint Research
• [Presentation] High energy hadron physics at zero-degree (2019)
  • Author(s): Hiroaki Menjo
  • Organizer: The 4th KMI international Symposium
  • Int'l Joint Research / Invited
• [Presentation] Results and future prospects of LHCf and RHICf (2019)
  • Author(s): 毛受弘彰
  • Organizer: 第三回 空気シャワー観測による宇宙線の起源探索勉強会
• [Presentation] An idea for improvement of neutrino flux calculation (2019)
  • Author(s): Hiroaki Menjo
  • Organizer: Workshop for Atmospheric Neutrino Production in the MeV to PeV range
  • Int'l Joint Research
• [Presentation] LHCf実験の陽子-酸素原子核衝突測定に向けた検討 (2019)
  • Author(s): 毛受弘彰
  • Organizer: 日本物理学会 第74回年次大会
• [Presentation] Opening and goal of this workshop (2019)
  • Author(s): Yoshitaka Itow
  • Organizer: Workshop for Atmospheric Neutrino Production in the MeV to PeV range
  • Int'l Joint Research
• [Presentation] Recent results from the LHCf experiment (2018)
  • Author(s): Hiroaki Menjo
  • Organizer: Ultra High Energy Cosmic Rays 2018
  • Int'l Joint Research
• [Presentation] LHCf/RHICf: a zero degree calorimeter at LHC and RHIC (2018)
  • Author(s): Hiroaki Menju
  • Organizer: International Workshop on Forward Physics and Forward Calorimeter Upgrade in ALICE
  • Int'l Joint Research / Invited
• [Presentation] LHC forward experiment: LHCf (2018)
  • Author(s): Hiroaki Menjo
  • Organizer: International school for Astroparticle physics
  • Int'l Joint Research / Invited
• [Presentation] LHCf実験とRHICf実験におけるパイゼロ解析の進展状況 (2018)
  • Author(s): 毛受弘彰
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Opening Remark (2018)
  • Author(s): Yoshitaka Itow
  • Organizer: 20th International Symposium on Very High Energy Cosmic Ray Interactions
  • Int'l Joint Research
• [Presentation] Initial results from RHICf (2018)
  • Author(s): Yoshitaka Itow
  • Organizer: 8th International Conference on Quarks and Nuclear Physics
  • Int'l Joint Research / Invited
• [Presentation] Recent results from LHCf and RHICf (2018)
  • Author(s): Takashi Sako
  • Organizer: 20th International Symposium on Very High Energy Cosmic Ray Interactions
  • Int'l Joint Research / Invited
• [Presentation] Status of the LHCf experiment (2017)
  • Author(s): Hiroaki Menjo
  • Organizer: 35th International Cosmic-Ray Conference (ICRC2017)
  • Int'l Joint Research / Invited
• [Presentation] LHCにおける宇宙線相互作用検証実験 LHCf 全体報告(2017年春)および陽子－鉛衝突測定報告 (2017)
  • Author(s): 伊藤好孝
  • Organizer: 日本物理学会 2017 年秋季大会
• [Presentation] RHIC加速器における超前方粒子測定実験 RHICf －2017年データ取得－ (2017)
  • Author(s): さこ隆志
  • Organizer: 日本物理学会 2017 年秋季大会
• [Presentation] Status of the RHIC forward experiment (2017)
  • Author(s): Takashi Sako
  • Organizer: Workshop on forward physics and high-energy scattering at zero degrees 2017
  • Int'l Joint Research / Invited
• [Remarks] LHC Forward Experiment
  • URL: http://www.isee.nagoya-u.ac.jp/LHCf/
• [Remarks] Welcome to the LHCf - Florence web page
  • URL: http://hep.fi.infn.it/LHCf/index.html
• [Remarks] LHCf
  • URL: http://home.cern/about/experiments/lhcf
• [Remarks] LHCf/RHICf 実験
  • URL: http://www.isee.nagoya-u.ac.jp/CR/research/interactions/
• [Remarks] 参加プロジェクト 名古屋大学素粒子宇宙起源研究機構(KMI)
  • URL: http://www.kmi.nagoya-u.ac.jp/collaboration-projects/
• [Funded Workshop] 20th International Symposium on Very High Energy Cosmic Ray Interactions (2018)
• [Funded Workshop] Forward Physics and High Energy Scattering at Zero Degrees 2017 (2017)