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arXiv 2008.073042020-08-17nucl-thhep-ph

Collective nuclear vibrations and initial state shape fluctuations in central Pb+Pb collisions: resolving the $v_2$ to $v_3$ puzzle

B. G. Zakharov

备注：: 6 pages
DOI：: 10.1134/S0021364020190029

英文摘要：

We have studied, for the first time, the influence of the collective quantum effects in the nuclear wave functions on the azimuthal anisotropy coefficients $ε_{2,3}$ in the central Pb+Pb collisions at the LHC energies. With the help of the energy weighted sum rule we demonstrate that the classical treatment with the Woods-Saxon nuclear density overestimates the mean square quadrupole moment of the $^{208}$Pb nucleus by a factor of $\sim 2.2$. The Monte-Carlo Glauber simulation of the central Pb+Pb collisions accounting for the restriction on the quadrupole moment leads to $ε_2/ε_3\approx 0.8$ which allows to resolve the $v_2$-to-$v_3$ puzzle.

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