Bose-Einstein Correlations of pi0 Pairs from Hadronic Z0 Decays
High Energy Physics - Experiment
2008-11-26 v1
Abstract
We observed Bose-Einstein correlation in pi0 pairs produced in Z0 decays using the data sample collected by the OPAL detector at LEP 1 from 1991 to 1995. Using a static Gaussian picture for the pion emitter source, we obtain the chaoticity parameter lambda = 0.55 +- 0.10 +- 0.10 and the source radius R = (0.59 +- 0.08 +- 0.05) fm. according to the JETSET and HERWIG Monte Carlo models, the Bose-Einstein correlations in our data sample largely connect pi0s originating from the decays of different hadrons. Prompt pions formed at string break-up of cluster decays only form a small fraction of the sample.
Cite
@article{arxiv.hep-ex/0302027,
title = {Bose-Einstein Correlations of pi0 Pairs from Hadronic Z0 Decays},
author = {The OPAL collaboration and G. Abbiendi},
journal= {arXiv preprint arXiv:hep-ex/0302027},
year = {2008}
}
Comments
18 pages, 5 figures