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arXiv · 2504.02726

Constraining hot and cold nuclear matter properties from heavy-ion collisions and deep-inelastic scattering

Anton Andronic·Nicolas Borghini·Xiaojian Du·Christian Klein-Bösing·Renata Krupczak·Hendrik Roch·Sören Schlichting
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Abstract

We perform a global analysis of deep-inelastic $e+p$ scattering data from HERA and transverse energy distributions in $p+p$ and $p+\mathrm{Pb}$ collisions, alongside charged hadron multiplicities in $\mathrm{Pb}+\mathrm{Pb}$ collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02\;\mathrm{TeV}$ from ALICE. Using a saturation-based initial state model grounded in high-energy QCD, we determine the early-time non-equilibrium shear viscosity to entropy density ratio $\eta/s$ of the quark-gluon plasma. Our results provide new insights into the early-time transport properties of nuclear matter under extreme conditions.

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Anton Andronic, Nicolas Borghini, Xiaojian Du, Christian Klein-Bösing, Renata Krupczak, Hendrik Roch, Sören Schlichting. 2025-04-03. Constraining hot and cold nuclear matter properties from heavy-ion collisions and deep-inelastic scattering. https://doi.org/10.1007/jhep04(2026)185

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