Coherent vector meson production from deuterons
L. Frankfurt1,4 - G. Piller2 - M. Sargsian2,5 - M. Strikman3,4
1 School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 69978 Israel
2 Physik Department, Technische Universität München, D-85747 Garching, Germany
3 Pennsylvania State University, University Park, PA 16802, USA
4 Institute for Nuclear Physics, St. Petersburg, Russia
5 Yerevan Physics Institute, Yerevan 375036, Armenia
Received: 22 January 1998 Communicated by A. Schäfer
Abstract
In this paper we discuss
coherent photo- and leptoproduction of vector mesons from
deuterons at intermediate (virtual) photon energies,
. We consider the
scattering from unpolarized and polarized targets
as well as processes where the polarization of the recoil deuteron
is measured. Our main motivation results from the need
for a quantitative analysis of the space-time structure
of photon-induced processes.
In this respect we suggest several possibilities to explore the
characteristic longitudinal interaction length in coherent vector
meson production.
Furthermore, we outline methods for an investigation
of color coherence effects.
Besides the presentation of benchmark values for the maximal possible
color coherence effect in various kinematic regions,
we illustrate the anticipated phenomena within the color
diffusion model.
Finally we recall that the determination of vector meson-nucleon
cross sections is not a closed issue.
Besides being not known to a satisfying accuracy,
they can be used to determine
the strength of the D-state in low mass vector mesons.
PACS
12.40.Vv Vector-meson dominance -
25.30.Rw Electroproduction reactions
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