Determination of the total c(c)over-bar production cross section in 340 GeV/c Sigma(-)-nucleus interactions

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Adamovich, M.I. ; Alexandrov, Y.A. ; Barberis, D. ; Beck, M. ; Berat, C. ; Beusch, W. ; Boss, M. ; Brons, S. ; Bruckner, W. ; Buenerd, M. ; Busch, C. ; Buscher, C. ; Charignon, F. ; Chauvin, J. ; Chudakov, E.A. ; Dersch, U. ; Dropmann, F. ; Engelfried, J. ; Faller, F. ; Fournier, A. ; Gerassimov, S.G. ; Godbersen, M. ; Grafstrom, P. ; Haller, T. ; Heidrich, M. ; Hubbard, E. ; Hurst, R.B. ; Konigsmann, K. ; Konorov, I. ; Keller, N. ... view all 63 authors (2000)
  • Publisher: Springer-Verlag
  • Related identifiers: doi: 10.1007/s100520000318
  • Subject: QC
    arxiv: Nuclear Experiment | High Energy Physics::Experiment

The production of charmed particles by 340 GeV/c momentum Sigma(-) was studied in the hyperon beam experiment WA89 at the CERN-SPSI using the Omega-spectrometer. In two data-taking periods in 1993 and 1994 an integrated luminosity of 1600 mu b(-1) on copper and carbon targets was recorded. From the reconstruction of 930 +/- 90 charm particle decays in 10 decay channels production cross sections for D! D, D-s(-) and Lambda(c)(+) were determined in the region x(F) gt 0. Assuming an Al dependence of the cross section on the nucleon number, we calculate a total c (c) over bar production cross section of sigma(c (c) over bar)(x(F) gt 0) = 5.3 +/- 0.4 (stat) +/- 1.0 (syst) + 1.0 (Xi(c)) mu b per nucleon. The last term is an upper limit on the unknown contribution from charmed-strange baryon production.
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