DOI 10.1007/s100529901055
Appearance of an
artificial length scale
in JETSET Bose-Einstein simulation
Raluca Muresan - Oxana Smirnova - Bengt Lörstad
Department of Elementary Particle Physics, Lund University, Box 118, SE-22100 Lund, Sweden
Received: 13 November 1997 / Revised version: 5 September 1998 / Published online: 14 January 1999
Abstract
This work studies the algorithm which implements the Bose-Einstein
correlation effect in the JETSET 7.4 event generator. This algorithm
attempts to reproduce an expected correlation function with a given
correlation radius and amplitude. The two-particle correlation
function is studied in the generated Z0 hadronic decays for
different values of the built-in radius parameter. Samples consisting
of only charged particles are used, as well as subsamples of pions,
pions coming from the string decay and pions from the resonance
decays.
The Bose-Einstein correlation function, extracted from the generated
events, is parameterized analogously to the built-in JETSET
correlation function and its parameters are compared with the input
ones. We found that the measured correlation function reproduces the
built-in one, if the input radius parameter is larger than 
. For
lower input radii an artificial new length scale appears due to the way the
Bose-Einstein correlation is implemented.
Copyright Springer-Verlag
