2011/05/09 by W. J. Metzger, T. Novák, Metzger, W. J. +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex
paper · pdf · doi:10.48550/arxiv.1105.1660
To appear in proceedings XL International Symposium on Multiparticle Dynamics, Antwerp, Sept. 2010
arxiv created 2011/05/09 · arxiv updated 2011/05/10
Bose-Einstein correlations of pairs of identical charged pions produced in hadronic Z decays are analyzed in terms of various parametrizations. A good description is achieved using a Lévy stable distribution in conjunction with a model where a particle's momentum is highly correlated with its space-time point of production, the tau model. However, a small but significant elongation of the particle emission region is observed in the Longitudinal Center of Mass frame, which is not accommodated in the tau model. This is investigated using an ad hoc modification of the tau model.