Effect of collective nuclear vibrations on initial anisotropies in central Pb+Pb collisions: A comparative study in Glauber and Trento models

B. G. Zakharov

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arXiv · 2611.09404

Effect of collective nuclear vibrations on initial anisotropies in central Pb+Pb collisions: A comparative study in Glauber and Trento models

B. G. Zakharov

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Abstract

We perform a comparison of the Glauber and Trento model predictions for the initial state azimuthal anisotropies $ε_{2,3}\{2\}$ in central Pb+Pb collisions at the LHC energies. We incorporate the quantum collective effects in $^{208}$Pb by sampling nucleon positions with filterings in the quadrupole and octupole moments. We use the data-driven filters adjusted to reproduce the mean squared quadrupole and octupole moments extracted from the experimental strength functions. We find that the collective effects reduce considerably the $ε_2\{2\}/ε_3\{2\}$ ratio. The reduction is more pronounced in the Trento model. We obtain $ε_2\{2\}/ε_3\{2\}\approx 0.75÷0.79(0.68÷0.71)$ in the Glauber(Trento) models. These values allow to resolve the $v_2$-to-$v_3$ puzzle.

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B. G. Zakharov. 2026-11-06. Effect of collective nuclear vibrations on initial anisotropies in central Pb+Pb collisions: A comparative study in Glauber and Trento models. https://arxiv.org/abs/2611.09404

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