Boost Invariance and Multiplicity Dependence of the Charge Balance Functionin $\pi^{+}p$ and $K^{+}p$ Collisions at $\sqrt s= 22$ GeV/c

TL;DR

This study investigates the boost invariance and multiplicity dependence of the charge balance function in pion-proton and kaon-proton collisions at 22 GeV/c, revealing invariance over rapidity and a narrowing with increased multiplicity.

Contribution

It demonstrates that the charge balance function is boost invariant across the rapidity region and depends on multiplicity, extending understanding from heavy ion to hadron collision systems.

Findings

Charge balance function is boost invariant across rapidity.

Balance function narrows with increasing multiplicity.

Results are consistent with observations in heavy ion experiments.

Abstract

Boost invariance and multiplicity dependence of the charge balance function are studied in $\pi^{+}\rp$ and $\rK^{+}\rp$ collisions at 250 GeV/$c$ incident beam momentum. Charge balance, as well as charge fluctuations, are found to be boost invariant over the whole rapidity region, but both depend on the size of the rapidity window. It is also found that the balance function becomes narrower with increasing multiplicity, consistent with the narrowing of the balance function when centrality and/or system size increase, as observed in current relativistic heavy ion experiments.