Evidence for Nonlinear Gluon Effects in QCD and their $A$ Dependence at STAR

STAR Collaboration, M. S. Abdallah, B. E. Aboona +382

The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-${\pi }^0$s produced at forward pseudorapidities ($2.6<\eta <4.0$) in $p$+$p$, $p+$Al, and $p+$Au co…