2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 6, 629-635
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 $1\,fm$. For lower input radii an artificial new length scale appears due to the way the Bose-Einstein correlation is implemented.


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