電子・陽子衝突による素粒子構造の研究の総括

• Project/Area Number: 11206101
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: High Energy Accelerator Research Organization (2004); The High Energy Accelerator Research Organization (1999-2003)
• Principal Investigator: 徳宿 克夫 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教授 (80207547)
• Co-Investigator(Kenkyū-buntansha): 浜津 良輔 東京都立大学, 理学研究科, 助教授 (20087092) ; 栗原 良将 大学共同利用機関法人, 高エネルギー加速器研究機構・素粒子原子核研究所, 助手 (50195559) ; 山田 作衛 大学共同利用機関法人, 高エネルギー加速器研究機構・素粒子原子核研究所, 名誉教授 (70011658) ; 山崎 祐司 高エネルギー加速器研究機構, 素粒子原子核研究所, 助手 (00311126) ; 久世 正弘 高エネルギー加速器研究機構, 素粒子原子核研究所, 助手 (00225153)
• Project Period (FY): 1999 – 2004
• Project Status: Completed (Fiscal Year 2004)
• Budget Amount: ¥216,300,000 (Direct Cost: ¥216,300,000); Fiscal Year 2004: ¥1,500,000 (Direct Cost: ¥1,500,000); Fiscal Year 2003: ¥46,500,000 (Direct Cost: ¥46,500,000); Fiscal Year 2002: ¥45,500,000 (Direct Cost: ¥45,500,000); Fiscal Year 2001: ¥45,700,000 (Direct Cost: ¥45,700,000); Fiscal Year 2000: ¥37,100,000 (Direct Cost: ¥37,100,000); Fiscal Year 1999: ¥40,000,000 (Direct Cost: ¥40,000,000)
• Keywords: 陽子の構造 / 素粒子 / クォーク / 標準模型 / 新粒子探索 / 強い相互作用 / 量子色力学 / 電子・陽子衝突 / HERA / 弱い相互作用 / 偏極散乱 / 回折反応 / グルーオン / 深非弾性散乱 / レプトン / W粒子

Research Abstract

本研究は特定領域研究「電子・陽子衝突による素粒子構造の研究」研究期間終了後の取りまとめであり、成果発表のためのシンポジウムの企画と、研究のまとめの報告書作成が主な研究活動であった。
平成16年11月4-6日、栃木県日光霧降高原の「メルモンテ日光霧降」に於いて「物質の創生と発展」と題してシンポジウムを開催した。国内外から研究者55名の参加があった。本研究の無偏極のデータから得られた多くの物理成果と、本研究の最終段階で始まった偏極陽電子・陽子衝突の暫定的な結果を発表した。シンポジウムではこれらの成果発表に加えて、宇宙開闢時の現象論から生物内での「陽子=水素イオン」の役割まで、陽子が役割を握る幅広い研究に関して、最前線の講師により講演をしてもらい、陽子の構造に関してさらに広い領域での研究協力の可能性もあることを確認した。シンポジウムの内容をWeb上に公表した。(http://research.kek.jp/group/zeus/nikko/index-f.htm)
特定領域の研究期間を過ぎてから発表した研究論文も含め、昨年末までに作成できなかった報告書の2分冊を作成した。第一分冊では、研究全体の概要と研究の最終年度に達成できた偏極衝突の成果を述べた。もう一冊(第五分冊)には、ジェット生成に関する研究を網羅し、素粒子の標準模型の重要な部分である量子色力学の検証に、我々の電子・陽子衝突実験が大きく貢献してきたことを示した。特に強い相互作用の結合定数の精度よい測定に関して詳細に報告した。

Research Products

• [Journal Article] Study of the pion trajectory in the photoproduction of leading neutrons at HERA (2005)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B610 Pages: 199-211
• [Journal Article] Isolated tau leptons in events with large missing transverse momentum at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B583 Pages: 41-58
• [Journal Article] Search for QCD-instanton induced events in deep inelastic ep scattering at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: The European Physical Journal C34 Pages: 255-265
• [Journal Article] Bottom photoproduction measured using decays into muons in dijet events in ep collisions at √<s>=318 GeV (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physical Review D70 Pages: 12008-12008
• [Journal Article] High-Q2 neutral current cross section in e^+p deep inelastic scattering at √<s>=318 GeV (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physical Review D70 Pages: 52001-52001
• [Journal Article] Search for contact interaction, large extra dimensions and finite quark radius in ep collisions at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B591 Pages: 23-41
• [Journal Article] Photoproduction of D^<*±> Mesons Associated with a Leading Neutron (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B590 Pages: 143-160
• [Journal Article] Observation of isolated high-E_T photons in deep inelastic scattering (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B595 Pages: 86-100
• [Journal Article] Exclusive electroproduction of J/psi mesons at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Nuclear Physics B695 Pages: 3-37
• [Journal Article] The dependence of dijet production on photon virtuality in ep collisions at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: The European Physical Journal C35 Pages: 487-500
• [Journal Article] Evidence for a narrow baryonic state decaying to K^0_s-(anti)proton in deep inelastic scattering at HERA (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Physics Letters B591 Pages: 7-22
• [Journal Article] Substructure dependence of jet cross sections at HERA and determination of Alpha_s (2004)
  • Author(s): ZEUS Collaboration, S.Chekanov et al.
  • Journal Title: Nuclear Physics B700 Pages: 3-50
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of proton-dissociative diffractive photoproduction of vector mesons at large momentum transfer at HERA"The European Physical Journal. C26. 389-409 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of high-Q^2 e-p neutral current cross sections at HERA and the extraction of xF_3"The European Physical Journal. C28. 175-201 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Leading proton production in e+p collisions at HERA"Nuclear Physics. B658. 3-46 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of event shapes in deep inelastic scattering at HERA"The European Physical Journal. C27. 531-545 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Scaling violations and determination of alpha_s from jet production in gamma p interactions at HERA"Physics Letters. B560. 7-23 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Search for single-top production in ep collisions at HERA"Physics Letters. B559. 153-170 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Dijet angular distributions in photoproduction of charm at HERA"Physics Letters. B565. 87-101 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "A search for resonance decays to lepton+jet at HERA and limits on leptoquarks"Physical Review. D68. 052004 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Jet production in charged current deep inelastic e+p scattering at HERA"The European Physical Journal. C31. 149-164 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of deeply virtual Compton scattering at HERA"Physics Letters. B573. 46-62 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of high-Q^2 charged current cross sections in e+p deep inelastic scattering at HERA"The European Physical Journal. C32. 1-16 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of the open-charm contribution to the diffractive proton structure function"Nuclear Physics. B672. 3-35 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Observation of K^0_sK^0_s resonances in deep inelastic scattering at HERA"Physics Letters. B578. 33-44 (2003)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of D^*± production in deep inelastic e±p scattering at HERA"Physical Review. D69. 012004 (2004)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Bose-Einstein correlations in one and two dimensions in deep inelastic scattering"Physics Letters. B583. 231-246 (2004)
• [Publications] P.Karataev et al.: "Status of optical diffraction radiation experiment at KEK-ATF extraction line"Nuclear Instruments and Methods in Physics Research. B201. 140-152 (2003)
• [Publications] G.Belanger et al.: "Full O(a) electroweak corrections to double Higgs-strahlung at the linear collider"Physics Letters. B576. 152-164 (2003)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Dijet production in neutral current deep inelastic scattering at HERA"The European Physical Journal. C23. 13-27 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Searches for excited fermions in ep collisions at HERA"Physics Letters. B549. 32-47 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurement of the photon-proton total cross section at a center-of-mass energy of 209 Ge V at HERA"Nuclear Physics. B627. 3-28 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "High-mass dijet cross sections in photoproduction at HERA"Physics Letters. B531. 9-27 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Dijet photoproduction at HERA and the structure of the photon"The European Physical Journal. C23. 615-631 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Search for lepton-flavor violation in e^+p collisions at HERA"Physical Review. D65. 092004 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Exclusive photoproduction of J/Psi mesons at HERA"The European Physical Journal. C25. 345-360 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurement of the Q^2 and energy dependence of diffractive interactions at HERA"The European Physical Journal. C25. 169-187 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Leading Neutron production in e^+p collisions at HERA"Nuclear Physics. B637. 3-56 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurement of high-Q^2 charged current cross sections in ep deep inelastic scattering at HERA"Physics Letters. B539. 197-217 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurement of diffractive production of D^<*±>(2010) mesons in deep inelastic scattering at HERA"Physics Letters. B545. 244-260 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "A ZEUS next-to-leading-order QCD analysis of data on deep inelastic scattering"Physical Review. D67. 012007 (2003)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of α_s"Physics Letters. B547. 164-180 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurements of inelastic J/psi and J/psi' photoproduction at HERA"The European Physical Journal. C27. 173-188 (2002)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Study of the azimuthal asymmetry of jets in neutral current deep inelastic scattering at HERA"Physics Letters. B551. 226-240 (2003)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Observation of the strange sea in the proton via inclusive φ-meson production in neutral current deep inelastic scattering at HERA"Physics Letters. B553. 141-158 (2003)
• [Publications] ZEUS Collaboration, S. Chekanov et al.: "Measurement of subjet multiplicities in neutral current deep inelastic scattering at HERA and determination of αs"Physics Letters. B558. 41-58 (2003)
• [Publications] H.Okuno et al.: "Experimental study of positron production from a W single crystal by the KEK 8-GeV electron linac beam"Nuclear Instruments and Methods in Physics Research. B201. 259-265 (2003)
• [Publications] T.Suwada et al.: "Measurement of positron production efficiency from a tungsten mono-crystalline target using 4 and 8 GeV electrons"Physical Review. E67. 016502 (2003)
• [Publications] T.Muto et al.: "Observation of incoherent diffraction radiation from a single edge target in the visible light region"Physical Review Letters. 90. 104801 (2003)
• [Publications] Y.Kurihara et al.: "QCD event generators with next-to-leading order matrix-elements and parton showers"Nuclear Physics. B654. 301-319 (2003)
• [Publications] S.Tsuno et al.: "GR@PPA_4b : A four bottom quark production event generator for pp/ppbar collisions"Computer Physics Communications. 151. 216-240 (2003)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Search for resonance decays to an anti-neutrino plus jet in e^+p scattering at DESY HERA"Physical Review. D63. 052002 (2001)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Measurement of dijet cross sections for events with a leading neutron in photoproduclion at HERA"Nucl. Phys. B. 596. 3-29 (2001)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Measurement of open beauty production in photoproduction at HERA"Euro. Phys. J.. C18. 625-637 (2001)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Measurement of dijet production in neutral current deep inelastic scattering at high Q^2 and determination of α_s"Physics Letters. B507. 70-88 (2001)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Study of the effective transverse momentum of partons in the proton using prompt photons in photoproduction at HERA"Physics Letters. B511. 19-32 (2001)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Multiplicity moments in deep inelastic scattering at HERA"Physics Letters. B510. 36-54 (2001)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Measurement of the neutral current cross section and F_2 structure function for deep inelastic e^+p scattering at HERA"Euro. Phys. J.. C21. 443-471 (2001)
• [Publications] ZEUS Collaboration, S.Chekanov et al.: "Three-jet production in diffractive deep inelastic scattering at HERA"Physics Letters. B516. 273-292 (2001)
• [Publications] ZEUS Collaboration, J.Breitweg et al.: "Properties of hadronic final states in diffractive deep inelastic scattering at HERA"Physical Review. D63. 052001 (2002)
• [Publications] S.Kitamura, T.Kon, T.Kobayashi: "Single scaler top production with polarized beams in ep collisions at HERA"Modern Physics Letters. A16. 947-955 (2001)
• [Publications] T.Abe: "GRAPE-Dilepton (version 1.1) A generator for dileption production in ep collision"Comp. Phys. Comm.. 136. 126-147 (2001)
• [Publications] Y.Kurihara et al.: "QED radiative correction for the single-W production using a parton shower method"Euro. Phys. J.. C20. 253-258 (2001)
• [Publications] Y.Kurihara et al.: "grc\n\n\gamma : Event generator for the single-and double -photon emission assoiated with neutrino pair-production"Comp. Phys. Comm.. 136. 443-471 (2001)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Search for Contact Interactions in Deep Inelastic e+p-->e+X Scattering at HERA"Euro.Phys.J.. C14. 239-254 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Angular and Current-Target Correlations in Deep Inelastic Scattering at HERA"Euro.Phys.J.. C12. 53-68 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of diffractive photoproduction of vector mesons at large momentum transfer at HERA"Euro.Phys.J.. C14. 213-238 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of inclusive prompt photon photoproduction at HERA"Phys.Lett.. B472. 175-188 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "The Q^2 Dependence of Dijet Cross Sections in gamma p Interactions at HERA"Physics Letters. B479. 37-52 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Search for Resonance Decaying to e^+-jet in e^+p Interactions at HERA"Euro.Phys.J.. C16. 253-267 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of Azimuthal Asymmentries in Deep Inelastic Scattering"Physics Letters. B481. 199-212 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of Inclusive D_s^<+-> Photoproduction at HERA"Physics Letters. B481. 213-227 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of the Proton Structure Function F_2 at Very Low Q^2 at HERA"Physics Letters. B487. 53-73 (2000)
• [Publications] ZEUS Collaboration,J.Breitweg et al.: "Measurement of exclusive ω electroproduction at HERA"Physics Letters. B487. 273-288 (2000)
• [Publications] T.Kon and T.Kobayashi and S.Kitamura: "Single sbottom/charm prodcution at HERA in an R partiy breaking supersymmetric model"Phys.Lett.. B494. 280-286 (2000)
• [Publications] Y.kurihara et al.: "QED Raidative Corrections to Non-Annihilation Processes Using the Structure Function and the Parton Shower"Progress of Theoretical Physics. 103. 1199-1211 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "W production and the search for events with an isolated high-energy lepton and missing transverse momentum at HERA"Phys. Lett.. B471. 411-428 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of high-Q2 neutral-current e+p deep inelastic scattering cross sections at HERA"Euro. Phys. J.. C11. 427-445 (1999)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of dijet photoproduction at high transverse energies at HERA"Euro. Phys. J..
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of high-Q2 changed-current e+p deep inelastic scattering cross sections at HERA"Euro. Phys. J.. C11. 411-428 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of multiplicity and momentum spectra in the current and target regions of the brief frame in deep inelastic scattering at HERA"Euro. Phys. J.. C11. 53-68 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of E ^2 _<T,Jet>/Q^2dependence of forward jet production at HERA"Phys. Lett.. B474. 223-233 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of D*^+ production and the charm contribution to F_2in deep inelastic scattering at HERA"Euro. Phys. J.. C12. 35-52 (2000)
• [Publications] ZEUS Collaboration, J. Breitweg et al.: "Measurement of Spin-Density Matrix Elements in Exclusive Electroproduction of Rho ^0Mesons at HERA"Euro. Phys. J.. C12. 383-410 (2000)