Hydrodynamic simulations of heavy-ion collisions demonstrate that cumulants linking mean pT and elliptic flow quantitatively match relations derived from initial-state entropy predictors and moments of harmonic flow.
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Rotated PCA of simulated Pb+Pb spectra separates spectral fluctuations into a coherent thermal mode that fully explains v0(pT) and a double-node geometric mode that drives the low-pT sign change of v02(pT).
The shape of v0(pT), not its zero-crossing, encodes physical information about radial flow because centrality and normalization choices only shift the curve vertically without changing its form.
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Cumulants of mean transverse momentum and elliptic flow in the hydrodynamic model of heavy-ion collisions
Hydrodynamic simulations of heavy-ion collisions demonstrate that cumulants linking mean pT and elliptic flow quantitatively match relations derived from initial-state entropy predictors and moments of harmonic flow.
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Thermal and geometric normal modes of spectral fluctuations in heavy-ion collisions
Rotated PCA of simulated Pb+Pb spectra separates spectral fluctuations into a coherent thermal mode that fully explains v0(pT) and a double-node geometric mode that drives the low-pT sign change of v02(pT).
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The shape of differential radial flow $v_0(p_T)$, not its zero-crossing, carries physical information
The shape of v0(pT), not its zero-crossing, encodes physical information about radial flow because centrality and normalization choices only shift the curve vertically without changing its form.