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arXiv · 2506.09899

Universality of scaling entropy in charged hadron multiplicity distributions at the LHC

L. S. Moriggi·F. S. Navarra·M. V. T. Machado
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Abstract

In this work, we investigate the scaling behavior of the entropy associated with the charged hadron multiplicity distribution P(N) in proton-proton collisions at the LHC. We show that the growth of this entropic indicator as a function of the Bjorken x variable exhibits a universal behavior, consistent with observations from deep inelastic scattering (DIS). This universality suggests that the entropy scaling is a property of the initial state and reflects the diffusive nature of gluon dynamics at small x. Furthermore, we demonstrate that high-multiplicity events are not accurately described by traditional KNO scaling and require a more precise description based on a diffusion scaling framework. This new scaling emerges naturally from the universal growth of partonic entropy and offers a deeper insight into the dynamics of particle production in high-energy hadronic collisions.

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L. S. Moriggi, F. S. Navarra, M. V. T. Machado. 2025-06-11. Universality of scaling entropy in charged hadron multiplicity distributions at the LHC. https://arxiv.org/abs/2506.09899

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