2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 13, 247-254
DOI 10.1007/s100520000318

Determination of the total $c\bar{c}$ production cross section
in 340 GeV/c $\mathrm{\Sigma^-}$-nucleus interactions

The WA89 Collaboration

M.I. Adamovich 8 - Yu.A. Alexandrov 8 a - D. Barberis 3 - M. Beck 5 - C. Bérat 4 - W. Beusch 2 - M. Boss 6 - S. Brons 5 b - W. Brückner 5 - M. Buénerd 4 - C. Busch 6 - C. Büscher 5 - F. Charignon 4 - J. Chauvin 4 - E.A. Chudakov 6 c - U. Dersch 5 - F. Dropmann 5 - J. Engelfried 6 d - F. Faller 6 e - A. Fournier 4 - S.G. Gerassimov 5 8 f - M. Godbersen 5 - P. Grafström 2 - Th. Haller 5 - M. Heidrich 5 - E. Hubbard 5 - R.B. Hurst 3 - K. Königsmann 5 g - I. Konorov 5 8 - N. Keller 6 - K. Martens 6 a - Ph. Martin 4 - S. Masciocchi 5 b - R. Michaels 5 - U. Müller 7 - H. Neeb 5 - D. Newbold 1 - C. Newsom a - S. Paul 5 - J. Pochodzalla 5 - I. Potashnikova 5 - B. Povh 5 - R.D. Ransome a - Z. Ren 5 - M. Rey-Campagnolle 4 b - G. Rosner 7 c - L. Rossi 3 - H. Rudolph 7 - C. Scheel d - L. Schmitt 7 - H.-W. Siebert 6 - A. Simon 6 - V.J. Smith 1 a - O. Thilmann 6 - A. Trombini 5 - E. Vesin 4 - B. Volkemer 7 - K. Vorwalter 5 - Th. Walcher 7 - G. Wälder 6 - R. Werding 5 - E. Wittmann 5 - M.V. Zavertyaev 8 a

1 University of Bristol, Bristol, UK
2 CERN, 1211 Genève 23, Switzerland
3 Genoa University/INFN, Dipt. di Fisica, 16146 Genova, Italy
4 Grenoble ISN, 38026 Grenoble, France
5 Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany
6 Universität Heidelberg, Physikalisches Institut, 69120 Heidelberg, Germany a
7 Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
8 Moscow Lebedev Physics Institute, 117924, Moscow, Russia

Received: 3 September 1999 / Published online: 3 February 2000 - © Springer-Verlag 2000

Abstract
The production of charmed particles by $340\,\mathrm{GeV}/c$ momentum $\Sigma^-$ was studied in the hyperon beam experiment WA89 at the CERN-SPS, using the $\Omega$-spectrometer. In two data-taking periods in 1993 and 1994 an integrated luminosity of $1600\,\mu\mbox{b}^{-1}$ on copper and carbon targets was recorded. From the reconstruction of $ 930 \pm 90$ charm particle decays in 10 decay channels production cross sections for D, ${\mathrm{\overline D}}$, Ds- and $\mathrm{\Lambda_c^+}$ were determined in the region xF>0. Assuming an A1 dependence of the cross section on the nucleon number, we calculate a total $c\bar{c}$ production cross section of $\sigma_{\mathrm{c}\mathrm{\overline{c}}}(x_F > 0) = 5.3\, \pm\,
0.4\,\, (stat)\,\, \pm\, 1.0\,\, (syst)\,\, +1.0\,\,(\mathrm{\Xi_c})\, \mu\mbox{b}$ per nucleon. The last term is an upper limit on the unknown contribution from charmed-strange baryon production.


Copyright Società Italiana di Fisica, Springer-Verlag 2000