Measurement of the impact-parameter dependent azimuthal anisotropy in coherent ${\rho }^0$ photoproduction in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

ALICE Collaboration

This Letter presents the first measurement of the impact-parameter dependent angular anisotropy in the decay of coherently photoproduced ${\rho }^0$ mesons. The ${\rho }^0$ mesons are reconstr…