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Direct Photon Production by π-p, π+p and pp Interaction at 280 GeV/c: Results from the WA70 Experiment at CERN

  • Michel Martin
Part of the NATO ASI Series book series (NSSB, volume 197)

Abstract

The W70 experiment was proposed in 1980, with the aim to study direct photon events in hadronic interactions. The experimental system consists of the CERN Omega spectrometer to which was added a fine grained electromagnetic calorimeter built for this experiment. The construction of the calorimeter, with its associated trigger electronics and calibration sytems was finished in 1983, the beam and trigger tuning as well as general conditions for data taking were also established in 1983, and data taking with full efficiency begun in 1984.

Keywords

Production Cross Section Direct Photon Photon Production Electromagnetic Calorimeter Prompt Photon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1).
    W. Beusch: CERN/SPSC 77–70, SPSC/T-17(1977)Google Scholar
  2. 2).
    M. Bonesini et al. “A lead-liquid scintillator electromagnetic calorimeter for direct photon physics” Nucl.Inst.Meth. A261 471 (1987)ADSCrossRefGoogle Scholar
  3. 3).
    M. Bonesini et al. “A 1152 channel timing system for an electromagnetic calorimeter readout” Nucl.Inst.Meth. A263 325 (1987)ADSGoogle Scholar
  4. 4).
    M. Bonesini et al. “Calibration of an electromagnetic calorimeter for direct photon physics” CERN-EP/87–227 Dec 1987, submitted to Nucl.Inst.Meth.Google Scholar
  5. 5).
    M. Bonesini et al. “High pT trigger electronics for a large orthogonal readout electromagnetic calorimeter” CERN-EP/87–200 Nov 1987, submitted to Nucl.Inst.Meth.Google Scholar
  6. 6).
    J.C. Lasalle, F. Carena, S. Pensotti Nucl. Inst.Meth. 176, 371 (1980)ADSCrossRefGoogle Scholar
  7. 7).
    H.U.Bengtsson, G. Ingelman, T.Sjöstrand: The Lund Monte Carlo for high-pt scattering, PYTHIA version 4.1, update of H.U. Bengtsson and G. Ingelman: Comp.Phys.Comm. 34, 251 (1985);Google Scholar
  8. T.Sjöstrand: Jet fragmentation, JETSET version 6.2, update of T.Sjöstrand: Comp.Phys. Comm. 27, 243, (1982)Google Scholar
  9. 8).
    M. Bonesini et al. “High transverse 70 production by 7- and Tr+ on protons at 280 GeV/c” Z. Phys. C 37, 39 (1987)ADSCrossRefGoogle Scholar
  10. 9).
    M. Bonesini et al. “Production of high transverse momentum prompt photons and neutral pions in proton-proton interactions at 280 GeV/c” CERN-EP/87–222, Dec 1987, to be published in Z. Phys C.Google Scholar
  11. 10).
    Aurenche, R Bayer, A. Douri, M Fontannaz and D. Schiff: Phys.Lett 140B, 87 (1984), and P. Aurenche, R. Bayer, M. Fontannaz, D. Schiff: Nucl. Phys. B286, 509 (1987)Google Scholar
  12. 11).
    D.W. Duke and J.F. Owens: Phys Rev.D30, 49 (1984); J.F. Owens: Phys.Rev. D30, 943 (1984)ADSGoogle Scholar
  13. 12).
    M. Bonesini et al. High transverse momentum prompt photon production by n-and 7+ on protons at 280 GeV/c CERN-EP/87–185, Oct 1987, to be published in Z. Phys. C.Google Scholar

Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Michel Martin
    • 1
  1. 1.University of GenevaGenevaSwitzerland

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