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CONF-860441—1
DE86 011507
SORENSEN 1/13
SIS®
EVENT SIMULATION FOR THE WA80 EXPERIMENT*
Soren P. SORENSEN
University of Tennessee, Knoxville, TN 39996, U.S.A., and
Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
The HIJET and LUND event generators are compared. It is concluded that
for detector construction and design of experimental setups, the differ-
ences between the two models are marginal. The coverage of the WA80
setup 1n pseudorapidity and energy 1s demonstrated. The performance of
some of the WA80 detectors (zero-degree calorimeter, wall calorimeter,
multiplicity array, and SAPHIR lead-glass detector) 1s evaluated based
on calculations with the LUND or the HIJET codes combined with codes
simulating the detector responses.
1. INTRODUCTION
It 1s a common misconception among physicists that simulations are only a
substitute for the real experimental data. This 1s not necessarily the case.
Many aspects of a complicated experimental setup can often be studied only by
doing simulation calculations: trigger bias, resolution of complicated experi-
mental quantities, distortion effects from limited detector coverage, off-line
data analysis algorithms, etc. For the ultrarelatlvlstlc heavy-ion program,
we are, furthermore, faced with the sltuat'on that the experimental conditions,
to a large extent, are unknown, and we have to rely on event generators In
order to get a feeling for what to expect at the SPS In CERN or the AGS In
Brookhaven..
In the WA80 collaboration, simulations have been used extensively for
studying many aspects of our setup. In the following, some examples will be
given to Illustrate this.
2. LUND VS. HIJET
At the time the WA80 event simulations were started, there existed two
different event generators, HIJET1 and the LUND model.2 A natural first step
was to compare these two models 1n order to evaluate to what extent the final
results of any simulation calculation will depend on the choice of event
generator. The physics behind the event generators will not be discussed here
since this 1s covered In a special section of these proceedings.
•Research sponsored by the U.S. Department of Energy under contract DE-AS05-
76ER04936 with the University of Tennessee and under contract DE-AC05-840R21400
with Martin Marietta Energy Systems, Inc.
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Sorensen, S.P. Event simulation for the WA80 experiment, article, January 1, 1986; Knoxville, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1100858/m1/1/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.