Determination of the total cc̄ production cross section in 340 GeV/c Σ--nucleus interactions

M. I. Adamovich, Yu A. Alexandrov, D. Barberis, M. Beck, C. Bérat, W. Beusch, M. Boss, S. Brons, W. Brückner, M. Buénerd, C. Busch, C. Büscher, F. Charignon, J. Chauvin, E. A. Chudakov, U. Dersch, F. Dropmann, J. Engelfried, F. Faller, A. FournierS. G. Gerassimov, M. Godbersen, P. Grafström, Th Haller, M. Heidrich, E. Hubbard, R. B. Hurst, K. Königsmann, I. Konorov, N. Keller, K. Martens, Ph Martin, S. Masciocchi, R. Michaels, U. Müller, H. Neeb, D. Newbold, C. Newsom, S. Paul, J. Pochodzalla, I. Potashnikova, B. Povh, R. D. Ransome, Z. Ren, M. Rey-Campagnolle, G. Rosner, L. Rossi, H. Rudolph, C. Scheel, L. Schmitt, H. W. Siebert, A. Simon, V. J. Smith, O. Thilmann, A. Trombini, E. Vesin, B. Volkemer, K. Vorwalter, Th Walcher, G. Wälder, R. Werding, E. Wittmann, M. V. Zavertyaev

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7 Scopus citations

Abstract

The production of charmed particles by 340 GeV/c momentum Σ- was studied in the hyperon beam experiment WA89 at the CERN-SPS, using the Ω-spectrometer. In two data-taking periods in 1993 and 1994 an integrated luminosity of 1600 μb-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, D̄, Ds- and Λc+ were determined in the region xF > 0. Assuming an A1 dependence of the cross section on the nucleon number, we calculate a total cc̄ production cross section of σcc̄(xF > 0) = 5.3 ± 0.4 (stat) ± 1.0 (syst) + 1.0 (Ξc) μb per nucleon. The last term is an upper limit on the unknown contribution from charmed-strange baryon production.

Original languageEnglish
Pages (from-to)247-254
Number of pages8
JournalEuropean Physical Journal C
Volume13
Issue number3
DOIs
StatePublished - 2000

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