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Multiplicity dependence of the pTp_T-spectra for charged particles and its relationship with partonic entropy

Published 2 May 2024 in hep-ph and hep-ex | (2405.01712v2)

Abstract: We investigate the multiplicity dependence of the transverse momentum pTp_T spectra of hadrons produced in high-energy collisions. We propose that the partonic distribution be parameterized by its non-extensive entropy and the parton saturation scale Qs(x)Q_s(x). These two variables can be identified from the produced charged hadron distributions and provide important information on the gluon dynamics at the moment of interaction. From this perspective we interpret data from different ALICE multiplicity classes at s=13\sqrt{s}= 13 TeV and s=5.02\sqrt{s}= 5.02 TeV. A multiplicity dependent scaling function is presented and the dependence of the interaction area on multiplicity is also investigated.

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