Charge asymmetries for D, D$_{\mathrm{s}}$ and $\Lambda_{\mathrm{c}}$ production in $\Sigma^-$-nucleus interactions at 340 $\mathrm{GeV/{\mit c}}$

The WA89 Collaboration: M.I. Adamovich - et al.

doi:doi:10.1007/s100529900019

EPJ

Charge asymmetries for D, D $_{\mathrm{s}}$ and $\Lambda_{\mathrm{c}}$ production in $\Sigma^{-}$ -nucleus interactions at 340 $\mathrm{ GeV/{\mit c}}$

The WA89 Collaboration
M.I. Adamovich ⁸ - Yu.A. Alexandrov ⁸ - D. Barberis ³ - M. Beck ⁵ - C. Bérat ⁴ - W. Beusch ² - M. Boss ⁶ - S. Brons ⁵ - W. Brückner ⁵ - M. Buénerd ⁴ - C. Busch ⁶ - C. Büscher ⁵ - F. Charignon ⁴ - J. Chauvin ⁴ - E.A. Chudakov ⁶ - U. Dersch ⁵ - F. Dropmann ⁵ - J. Engelfried ⁶ - F. Faller ⁶ - A. Fournier ⁴ - S.G. Gerassimov ⁵ ⁸ - M. Godbersen ⁵ - P. Grafström ² - Th. Haller ⁵ - M. Heidrich ⁵ - E. Hubbard ⁵ - R.B. Hurst ³ - K. Königsmann ⁵ - I. Konorov ⁵ ⁸ - N. Keller ⁶ - K. Martens ⁶ - Ph. Martin ⁴ - S. Masciocchi ⁵ - R. Michaels ⁵ - U. Müller ⁷ - H. Neeb ⁵ - D. Newbold ¹ - C. Newsom - S. Paul ⁵ , J. Pochodzalla ⁵ - I. Potashnikova ⁵ - B. Povh ⁵ - R.D. Ransome - Z. Ren ⁵ - M. Rey-Campagnolle ⁴ - G. Rosner ⁷ - L. Rossi ³ - H. Rudolph ⁷ - C. Scheel - L. Schmitt ⁷ - H.-W. Siebert ⁶ - A. Simon ⁶ - V.J. Smith ¹ - 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

¹ University of Bristol, Bristol, UK
² CERN, CH-1211 Genève 23, Switzerland
³ Genoa University/INFN, Dipt. di Fisica, I-16146 Genova, Italy
⁴ Grenoble ISN, F-38026 Grenoble, France
⁵ Heidelberg Max-Planck-Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany
⁶ Heidelberg University, Physikal. Institut, D-69120 Heidelberg Germany
⁷ Mainz University, Institut für Kernphysik, D-55099 Mainz, Germany $^{\rm n}$
⁸ Moscow Lebedev Physics Institute, 117924 Moscow, Russia

Received: 16 September 1998 / Published online: 1 March 1999

Abstract
CERN experiment WA89 has studied charmed particles produced by a $\Sigma^{-}$ beam at 340GeV/c on nuclear targets. Production of particles which have light quarks in common with the beam is compared to production of those which do not. Considerable production asymmetries between $\mathrm{D}^-$ and $\mathrm{D}^+$ , $\mathrm{D}_\mathrm{s}^-$ and $\mathrm{D}_\mathrm{s}^+$ and $\Lambda_{\mathrm{c}}$ and $\bar{\Lambda_\mathrm{c}}$ are observed. The results are compared with pion beam data and with theoretical calculations.

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Charge asymmetries for D, D and production in -nucleus interactions at 340

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Charge asymmetries for D, D $_{\mathrm{s}}$ and $\Lambda_{\mathrm{c}}$ production in $\Sigma^{-}$ -nucleus interactions at 340 $\mathrm{ GeV/{\mit c}}$