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1999 Fiscal Year Final Research Report Summary

Search for Exotic Mesons with High Precision Gamma-ray Detector (GAMS)

Research Project

Project/Area Number 10044100
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research Field 素粒子・核・宇宙線
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

TSURU Tsuneaki  KEK, Institute of Particle and Nuclear Studies, Assoc.Prof., 素粒子原子核研究所, 助教授 (60044781)

Co-Investigator(Kenkyū-buntansha) TAKAMATSU Kunio  Miyazaki, U., Engin., Prof., 工学部, 教授 (40013370)
FUJII Yoshiaki  KEK, Institute of Particle and Nuclear Studies, Researcher, 素粒子原子核研究所, 助手 (70190006)
INABA Susumu  KEK, Institute of Particle and Nuclear Studies, Assoc.Prof., 素粒子原子核研究所, 助教授 (10013434)
SHIMIZU Hajime  Yamagata U., Science, Prof., 理学部, 教授 (20178982)
NAKAGAWA Takemi  Tohoku U.Science, Prof., 理学部, 教授 (70004348)
Project Period (FY) 1998 – 1999
KeywordsExotic Meson / Meson Spectroscopy / non-qq meson / chiral symmetry / Glueball / hybrid / Gamma Detector / sigma
Research Abstract

Experiments of search for non-qq exotic mesons (glueballs, hybrids etc.) and new chiral symmetry particles (sigma etc.) were performed using 450GeV Super Proton Synchrotron at CERN and 70GeV Proton Synchrotron at IHEP (Russia) in relation with experiments at 12GeV Proton Synchrotron at KEK, and the obtained data were analyzed at each institute. R&D works of detectors and front end electronics were also done in the framework of the GAMS collaboration.
At CERN, central production reactions pp→p_sX^0p_f (X^0=π^+ π^-, π^0π^0, η η etc.) were studied and at IHEP and KEK, charge exchange reactions π^-p→X^0n X^-p (X^0= η π^0 etc.X^-=η π^- etc) are mainly persued.
A primary scalar glueball candidate f_0(1500)/G1590) which was found firstly by our GAMS group in 1983, was confirmed in relevant channels (η η, η η' etc.) by the new analyses of CERN and IHEP data
A non-qq 1^<-+> state in the η π^- channel found at KEK was confirmed by other two group (MPS at BNL and VES at IHEP).
Many resonances in many … More decay channels were studied by our WA102 group using the OMEGA spectrometer with detection capability of charged particles and gammas and particle identification.
The sigma meson, a chiral partner of π as a Goldstone boson, was studied with collaboration with the theoretical group of Nihon University. This meson was seen around the 500 MeV mass region in π^0π^0 channel of many production reactions (pp central collision, J/φ decay, D decay etc.). The difficult problems in the scattering process, which had not been solved for 20 years, was studied and solved on new ideas of several groups and the new method of Nihon-Univ.group.
A prototype of a new electromagnetic calorimeter hodoscope using new material, lead tungstate (PWO) was built and successfully tested. A new full-custom IC chips for ADC with high speed (less than 1 μ sec.) and high linearity resolution (more than 10bits) was developed successfully with the best level in the world.
These works were performed on the basis on agreement on collaboration between KEK and IHEP.The agreement is continued till October of 2005. Less

  • Research Products

    (60 results)

All Other

All Publications (60 results)

  • [Publications] D.Barbies et al.: "A study of the centrally produced π^+π^-π^0 channel in pp interactions at 450 GeV/c"Physics Letters. B422. 399 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barbies et al.: "A study of pseudoscalar states produced centrally in pp interactions at 450 GeV/c."Physics Letters. B427. 398 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barbies et al.: "A study of the centrally produced φ φ system in pp interactions at 450 GeV/c."Physics Letters. B432. 436 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barbies et al.: "A study of the centally produced K^*K^* and φ ω systems in pp interactions at 450 GeV/c."Physics Letters. B436. 204 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barbies et al.: "A measurement of the branching fractuins of thef_1(1285) and f_1(1420) produced in central pp interactions at 450 GeV/c."Physics Letters. B440. 225 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barbies et al.: "A study of the centally produced baryon antibaryonsystems in pp interactions at 450 GeV/c."Physics Letters. B446. 342 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.V.Dolgopolov et al.: "Results of a beam test of the combined lead glass and PWO cells detector for the COMPASS electromagnetic calorimeter"Nuclear Instruments and Methods in Physics Research. A420. 20 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Alde et al.: "Study of the π^0π^0 system with the GAMS-4000 spectrometer at 100 GeV/c"Eur.Phys.J.. A3. 361 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A partial wave analysis of the centrally produced K^+K^- and K^0_sK^0_s systems in pp interactions at 450 GeV/c and new information on the spin of the f_J(1710),"Phys.Lett.. B453. 305 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A partial wave analysis of the centrally produced π^+π^- system in pp interactions at 450 GeV/c"Phys.Lett.. B453. 316 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A partial wave analysis of the centrally produced π^0π^0 system in pp interactions at 450 GeV/c"Phys.Lett.. B453. 325 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] FD..Binon et al.: ". Beam studies of SAD-150 heavy crystal PWO calorimeter, small angle multiphoton detector of GAMS-4π spectrometer"Nucl.Instrum.and Meth.in Physics Research. A428. 292 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A coupled channel analysis of the centrally produced K^+K^- and π^+π^- final states in pp interactions at 450 GeV/c"Phys.Lett.. B462. 462 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "Experimental evidence for a vector-like behavior of Pomeron exchange"Phys.Lett.. B467. 165 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A partial wave analysis of the centrally produced π^0π^0 system in pp interactions at 450 GeV/c"Phys.Lett.. B467. 296 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Alde et al.: "Study of the reaction π^-p→ηπ^0 at 32-Gev/c, 38-GeV/c and 100-GeV/c"Phys.Atom.Nucl.. 62. 405 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Alde et al.: "Study of the reaction π^-p→ηπ^0 at 32-Gev/c, 38-GeV/c and 100-GeV/c"Yad.Fiz.. 62. 462 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Aldeet al.: "Investigation of the π^0π^0 system at a primary momentum of 100-GeV/c by using GAMS-4000 spectrometer"Phys.Atom.Nucl.. 62. 405 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Aldeet al.: "Investigation of the π^0π^0 system at a primary momentum of 100-GeV/c by using GAMS-4000 spectrometer"Yad.Fiz.. 62. 446 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Inaba et al.: "A Monolithic Charge-to-Amplitude Converter (QAC) Chip for Fast Readout of Photomultiplier"Nucl.Instrum.and Meth.in Physics Research. A442. 309 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Inaba et al.: "Development of a QAC with Dual Sensitivities using a Bipolar Full-Custom IC Technology"Nucl.Instrum.and Meth.in Physics Research. A455. 683 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the ηη' and η'η' channels produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 429 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the ηπ^+π^- channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 435 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A spin analysis of the 4π channels produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 440 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the f_0(1370), f_0(1500), f_0(2000) and f_2(1950) observed in the centrally produced 4π final states"Phys.Lett.. B474. 423 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the ηη channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B479. 59 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the ωω channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B484. 198 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A search for charmonium states produced in central pp interactions at 450 GeV/c"Phys.Lett.. B485. 357 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Barberis et al.: "A study of the centrally produced ηπ^0 and ηπ^- systems in pp interactions at 450 GeV/c"Phys.Lett.. B488. 225 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Ishida et al.: ". Effect of light sigma-meson Production in ppbar -> 3 π^0 at rest Chiral Symmetry"Prog.Theor.Phys.. 104. 203 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 1.D.Barberis et al, WA102 Collaboration: "A study of the centrally produced π^+ π^- π^0 channel in pp interactions at 450 GeV/c"Phys.Lett.. B422. 399-404 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 2.D.Barberis et al, WA102 Collaboration: "A study of pseudoscalar states produced centrally in pp interactions at 450 GeV/c"Phys.Lett.. B427. 398-402 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 3.D.Barberis et al, WA102 Collaboration: "A study of the centrally produced φ φ system in pp interactions at 450 GeV/c"Phys.Lett.. B432. 436-442 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 4.D.Barberis et al, WA102 Collaboration: "A study of the centrally produced K^*(892) K^*(892) and φω systems in pp interactions at 450 GeV/c"Phys.Lett.. B436. 204-210 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 5.D.Barberis et al, WA102 Collaboration: "A measurement of the branching fractions of the f_1(1285) and f_1(1420) produced in central pp interactions at 450 GeV/c."Phys.Lett.. B440. 225-232 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 6.D.Alde et al., GAMS Collaboration: "Study of the π^0 π^0 system with the GAMS-4000 spectrometer at 100 GeV/c"Eur.Phys.J.. A3. 361-371 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 7.A.V.Dolgopolov et al.: "Results of a beam test of the combined lead glass and PWO cells detector for the COMPASS electromagnetic calorimeter"Nucl.Instrum.and Meth.in Physics Research. A 420. 20-28 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 8.D Barberis et al, WA102 Collaboration: "A study of the centrally produced baryonantibaryon systems in pp interactions at 450 GeV/c"Phys.Lett.. B446. 342-348 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 9.D.Barberis et al, WA102 Collaboration: "A partial wave analysis of the centrally produced K^+K^- and K^0_sK^0_s systems in pp interactions at 450 GeV/c and new information on the spin of the f_J(1710)"Phys.Lett.. B453. 305-315 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 10.D.Barberis et al, WA102 Collaboration: "A partial wave analysis of the centrally produced π^+ π^- system in pp interactions at 450 CeV/c"Phys.Lett.. B453. 316-324 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 11.D.Barberis et al, WA102 Collaboration: "A partial wave analysis of the centrally produced π^0π^0 system in pp interactions at 450 GeV/c"Phys.Lett.. B453. 325-332 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 12.F.G.Binon: "Beam studies of SAD-150 heavy crystal PWO calorimeter, small angle multiphoton detector of GAMS-4π Spectrometer"Nucl.Inst.and Meth.. A 428. 292-298 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 13.D.Barberis et al, WA102 Collaboration: "A coupled channel analysis of the centrally produced K^+K^- and π^+π^- final states in pp interactions at 450 GeV/c"Phys.Lett.. B462. 462-470 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 14.D.Barberis et al, WA102 Collaboration: "Experimental evidence for a vector-like behavior of Pomeron exchange"Phys.Lett.. B467. 165-170 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 15.R.Bellazzini, GAMS Collaboration: "A partial wave analysis of the centrally produced π^0π^0 system in pp interactions at 450 GeV/c"Phys.Lett.. B467. 296-302 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 16.D.Alde, GAMS Collaboration: "Study of the reaction π^-p→η π^0 at 32-Gev/c, 38-GeV/c and 100-GeV/c"Phys.Atom.Nucl.. 62. 421-434 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D.Alde, GAMS Collaboration: "Study of the reaction π^-p→η π^- at 32-Gev/c, 38-GeV/c and 100-GeV/c"Yad.Fiz.. 62. 462-476 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 17.D.Alde, Gams Collaboration: "Investigation of the π^0π^0 system at a primary momentum of 100-GeV/c by using GAMS-4000 spectrometer"phys.Atom.Nucl.. 62. 405-420 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D.Alde, Gams Collaboration: "Investigation of the π^0π^0 system at a primary momentum of 100-GeV/c by using GAMS-4000 spectrometer"Yad.Fiz.. 62. 446-461 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 18.S.Inaba et al.: "A Monolithic Charge-to-Amplitude Converser (QAC) Chip for Fast Readout of Photomultiplier"Nucl.Inst.and Meth.in Physics Research. A 442. 309-315 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 19.S.Inaba et al.: "Development of a QAC with Dual Sensitivities using a Bipolar Full-Custom IC Technology"Nucl.Instrum.and Meth.in Physics Research. A 455. 683-697 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 20.D.Barberis et al, WA102 Collaboration: "A study of the η η' and η η' channels produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 429-434 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 21.D.Barberis et al, WA102 Collaboration: "A study of the η π^+π^- channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 435-439 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 22.D.Barberis et al, WA102 Collaboration: "A spin analysis of the 4π channels produced in central pp interactions at 450 GeV/c"Phys.Lett.. B471. 440-448 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 23.D.Barberis et al, WA102 Collaboration: "A study of the f_0(1370), f_0(1500), f_0(2000) and f_2(1950) observed in the centrally produced 4π final states"Phys.Lett.. B474. 423-426 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 24.D.Barberis et al, WA102 Collaboration: "A study of the η η channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B479. 59-66 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 25.D.Barberis et al, WA102 Collaboration: "A study of the ω ω channel produced in central pp interactions at 450 GeV/c"Phys.Lett.. B484. 198-204 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 26.D.Barberis et al, WA102 Collaboration: "A search for charmonium states produced in central pp interactions at 450 GeV/c"Phys.Lett.. B485. 357-361 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 27.D.Barberis et al, WA102 Collaboration: "A study of the centrally produced η π^0 and η π^- systems in pp interactions at 450 GeV/c"Phys.Lett.. B488. 225-233 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 28.M.Ishida et al.: "Effect of light sigma-meson Production in ppbar ->3 π^0 at rest Chiral Symmetry"Prog.Theor.Phys.. 104. 203-210 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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