In PYTHIA8 and EPOS-LHC simulations of pp collisions, charge balance function widths narrow with multiplicity, are narrower in jet-like than isotropic events, and EPOS core-on/off differences point to radial flow as the localizing mechanism.
Longitudinal scaling property of the charge balance function in Au + Au collisions at 200 GeV
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abstract
We present measurements of the charge balance function, from the charged particles, for diverse pseudorapidity and transverse momentum ranges in Au + Au collisions at 200 GeV using the STAR detector at RHIC. We observe that the balance function is boost-invariant within the pseudorapidity coverage [-1.3, 1.3]. The balance function properly scaled by the width of the observed pseudorapidity window does not depend on the position or size of the pseudorapidity window. This scaling property also holds for particles in different transverse momentum ranges. In addition, we find that the width of the balance function decreases monotonically with increasing transverse momentum for all centrality classes.
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Two-particle number and transverse momentum balance function with event-topology in pp collisions at $\sqrt{s}=13$ TeV
In PYTHIA8 and EPOS-LHC simulations of pp collisions, charge balance function widths narrow with multiplicity, are narrower in jet-like than isotropic events, and EPOS core-on/off differences point to radial flow as the localizing mechanism.