Disappearance of rotational flow and reaction plane dispersions in Kr+Au collisions

Two-particle azimuthal correlations have been used to extract reaction plane dispersion free triple-differential cross sections for $d$, $t$, and $\alpha$ particles for the midcentral collisions of ${}^{84}\mathrm{Kr}{+}^{197}\mathrm{Au}$ at $E/A=35\mathrm{}$, 55, and 70 MeV. Both experimental measurements and extrapolations from lower incident energies suggest that rotational flow disappears at $E/A\approx 100$ MeV for light charged particles and that reaction plane dispersions introduce large uncertainties in extracting the disappearance of rotational flow.