A new statistical model for multiparticle production in e+e- annihilation is proposed based on the idea of the longitudinal phase space with limited transverse momentum. The longitudinal rapidity space is divided into cells of equal size in order to take into account the Bose-Einstein correlations (BECs) with a finite correlation length δy. The maximum entropy method is used to determine the probability distributions of the final state pions (or ρ mesons) for a given mean multiplicity, mean transverse momentum, and mean total energy. Event simulation based on our model is performed in two extreme cases: a π model and a ρ model. The π model assumes that only pions are produced directly. On the other hand, the ρ model assumes that only ρ mesons are produced directly and they decay into pions. A good overall fit to experimental data from DESY PETRA to CERN LEP energy regions is obtained for δy ranging from 0.6 to 1.2 in the π model. We find that the BECs play a very important role in reproducing various correlation data. In some correlation data, resonance effects and conservation laws are also important.
|Number of pages||16|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 1999 Jan 1|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)