Tests of the JETSET Bose-Einstein correlation model in the e+e- annihilation process

TL;DR

This paper evaluates the JETSET model's ability to simulate Bose-Einstein correlations in e+e- annihilation, revealing limitations and proposing insights into the effective source size and correlation functions.

Contribution

The study critically assesses the JETSET model's implementation of Bose-Einstein correlations and identifies a new effective length scale affecting its applicability.

Findings

Identification of a new effective source size scale

Limitations of the momentum-shifting mechanism in JETSET

Comparison of correlation functions with DELPHI data

Abstract

Studies of implementation of the simulation of the Bose-Einstein correlation effects in the JETSET particle generator are performed. Analysis of dependance of the one-dimensional correlation function parameters on the presumed boson source size reveals appearance of the effective new length scale, which limits applicability of the simple momentum-shifting mechanism, employed by JETSET to simulate the Bose-Einstein correlation. Two- and three-dimensional correlation functions are analysed as well and compared to the DELPHI data.