On Resonance Contribution to Balance Functions

Abstract

It is known that resonance decays influence the shape of the charge-balance functions measured in hadronic collisions. That is reflected in their rapidity and azimuthal widths and the integral, and therefore has consequences for different model interpretations. In this paper, we show that the contribution from neutral resonance decays can be removed from the balance function in an analytical way, and test the performance of the removal procedure with PYTHIA events. Prospects for applications of the procedure to real data analysis of balance functions are also discussed.

Baselines for higher-order cumulants of net-charge distributions from local charge conservation

“…Namely, we may consider a system, where each source is positioned at some rapidity and emits exactly one particleantiparticle pair. There could be a mixture of sources of different nature (for instance, resonances of several types) -in this case it is enough to consider a "weighted averaged" source of the system, which is characterized by the balance function [13]. Assume also that rapidities of different sources are uncorrelated, and that particles produced from one source do not interact with particles from other sources.…”