| The George Washington Data Analysis Center (DAC) was created
in 1998 by an agreement among the Department of Energy,
Jefferson Lab, and the GW Center for Nuclear Studies.
Recommitments have been made by all involved that assure the
continuation of the DAC through 2005. Software development for
the DAC is being supported by an NSF/ITR grant in conjunction
with the GW Computer Science Department. The members of the
DAC are Associate Research Professors R.L. Workman, and I.I.
Strakovsky, Research Professor R.A. Arndt, and Professor W.J.
Briscoe. The DAC is organized as part of the GW Center for
Nuclear Studies. Since two of the DAC members also belong to
our Experimental Nuclear Physics group, we have a particularly
close relationship with an analysis group that will greatly aid and
amplify our experimental efforts in N* and related physics.
The activities of the DAC fall into four distinct categories:
a) PWA: Performing partial-wave analyses of fundamental two-
and three-body reactions;
b) Databases: Maintenance of databases associated with these
reactions;
c) Development and upkeep of the SAID system: Development of
software to disseminate DAC results (as well as the results of
competing model-independent analyses and potential
approaches);
d) Phenomenological and theoretical investigations: studies which
bridge the gap between theory and experiment; in particular, the
extraction of N* and D * hadronic and electromagnetic couplings.
Examples of the reaction channels being studied, in addition to
the traditional p N and NN channels, are the (g ,p ) and (e,e´p )
reactions. In keeping with the experimental program at JLab,
these studies are being extended to include photoproduction and
electroproduction of other pseudoscalar, strange, and vector
mesons, in keeping with our general goal of understanding the
properties of the short-range part of the nuclear force. Even
more important, however, is to develop the ability to perform a
combined analysis of all of these reaction channels – this is a
situation where it is clear that the whole is greater than the sum
of its parts.
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