FIG. 1 .
1Neutron multiplicity dependence of acoplanarity distributions from γγ → μ þ μ − for p μ T > 3.5 GeV, jη μ j < 2.4, jy μμ j < 2.4, and 8 < m μμ < 60 GeV in ultraperipheral Pb-Pb collisions at ffiffiffiffiffiffiffiffi s NN p ¼ 5.02 TeV. The α distributions are normalized to unit integral over their measured range. The dot-dot-dashed and dotted lines indicate the core and tail contributions, respectively, found using a fit to Eq. (1). The vertical lines on **data** points depict the statistical uncertainties, while the systematic uncertainties and horizontal bin widths are shown as gray boxes.
