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

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arxiv 2405.01712 v2 pith:HTS6EB6V submitted 2024-05-02 hep-ph hep-ex

classification hep-phhep-ex
keywords multiplicitydependencechargedentropyinteractionpartonicproducedspectra
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We investigate the multiplicity dependence of the transverse momentum $p_T$ 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 $Q_s(x)$. 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 $\sqrt{s}= 13$ TeV and $\sqrt{s}= 5.02$ TeV. A multiplicity dependent scaling function is presented and the dependence of the interaction area on multiplicity is also investigated.

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  1. Precise determination of pomeron intercept via scaling entropy analysis

    hep-ph 2024-12 conditional novelty 5.0 of 10

    Measuring the entropy of final-state hadron multiplicities in H1 data gives a Pomeron intercept of 0.322 ± 0.007, consistent with the value from inclusive DIS cross-section scaling.

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