Statistical and Dynamic Models of Charge Balance Functions

Details Statistical and Dynamic Models of Charge Balance Functions Statistical and Dynamic Models of Charge Balance Functions

2004-01-06

arxiv.org/abs/nucl-th/0401008v1

Phys.Rev. C69 (2004) 054906

Physics

Nuclear Physics

Nuclear Theory

12 pages 6 figures

Scientific paper

10.1103/PhysRevC.69.054906

Charge balance functions, which identify balancing particle-antiparticle pairs on a statistical basis, have been shown to be sensitive to whether hadronization is delayed by several fm/c in relativistic heavy ion collisions. Results from two classes of models are presented here, microscopic hadronic models and thermal models. The microscopic models give results which are contrary to recently published pi+pi- balance functions from the STAR collaboration, whereas the thermal model roughly reproduce the experimental results. This suggests that charge conservation is local at breakup, which is in line with expectations for a delayed hadronization. Predictions are also presented for balance functions binned as a function of Q_inv.

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