Dear Colleagues,

    CDF Note#2946 which describes a study of the SVX' detector and
the development of the new SVX' MC simulation is now available for perusing.
This coffee table document contains a large number (32) of full size plots 
(which explains its length of 61 pages) comparing the new MC to DATA.

Here's the abstract:

			The SVX' MC Simulation
         H.Y.Chao, D.Glenzinski, J.Incandela, N.M.Shaw, F.Snider, 
                  D.Stuart, G.Unal, M.J. Wang, W.Yao

                                ABSTRACT
   The important role of the CDF silicon vertex detector in top and bottom 
physics warrants a detailed understanding and faithful simulation of this 
detector. A consistent data and MC b tagging efficiency, for example, is a high
priority of the B tag group for the run Ib top analysis.
In this note we summarize the results of a project which we
believe has culminated in a good understanding of signal formation
in SVX'. This understanding, which is facilitated
by the good signal-to-noise ratio of the new detector, has been applied
to the creation of a fast detector simulation which reproduces the silicon
detector data in significant detail at the cluster, track and vertex levels.
Recent comparisons of data and MC with the new SVX' simulation
indicate good agreement for b tagging efficiencies.

The simulation is built upon parameterizations of very basic characteristics
of detector signals. To reproduce variations in noise and thresholds across the
detector, real noise and hardware threshold values are obtained from the CDF
database for use in the simulation. Pulse height and charge profiles
(distribution of charge among the strips in a cluster),
are studied in the context of microstrip geometry, dE/dx and track parameters
of ionizing particles in silicon, and the presence of noise and
delta rays. Finally the underlying event in
PYTHIA is tuned at the generation level to yield a good match to data
for the number of on-track and off-track clusters in generic jet events.
The outcome of this is a straightforward simulation procedure which we
describe and demonstrate by (exhaustive) comparison to data.

Send comments on the note to FNALD::INCANDEL

If you need help to run the MC, contact Mark Shaw FNALD::NMSHAW 
Sorry Mark...
 
Posted to CDF$PUB: as CDF2946_SVXPRIME_MC.PS
Posted by FNALH::INCANDEL