Eur. Phys. J. A 14, 255-263 (2002)
DOI: 10.1140/epja/i2002-10002-4
Probing the interactions of charmed mesons with nuclei in
-induced reactions
Ye.S. Golubeva1, W. Cassing2 and L.A. Kondratyuk3
1 Institute for Nuclear Research, 60th October Anniversary Prospect 7A, 117312 Moscow, Russia
2 Institut für Theoretische Physik, Universität Giessen, D-35392 Giessen, Germany
3 Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117259 Moscow, Russia
Wolfgang.Cassing@theo.physik.uni-giessen.de
(Received: 1 March 2002 Communicated by V.V. Anisovich)
Abstract
We study the perspectives of resonant and nonresonant
charmed-meson production in
reactions within the
Multiple Scattering Monte Carlo (MSMC) approach. We calculate the
production of the resonances
and
on various nuclei, their propagation and decay to
in the medium and vacuum,
respectively. The modifications of the open charm vector mesons in
the nuclear medium are found to be rather moderate or even small
such that dilepton spectroscopy will require an invariant mass resolution of a few MeV.
Furthermore, the elastic and inelastic interactions
of the open charm mesons in the medium are taken into account, which can be related to
(u,d)-,
s- or
c-quark exchange with nucleons. It
is found that by studying the
ratio for low momenta in the laboratory
(
GeV/c) as a function of the target mass
A stringent constraints on the
c-quark exchange cross-section can be obtained. On the other hand, the ratios
D-s/D+s as well as
D/D-s
and
D/D+s at low momenta as a function of
A will permit to fix independently
the strength of the
s-quark exchange reaction in
D-s N scattering.
25.43.+t - Antiproton-induced reactions.
14.40.Lb - Charmed mesons.
14.65.Dw - Charmed quarks.
13.25.Ft - Decays of charmed mesons.
© Società Italiana di Fisica, Springer-Verlag 2002
