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We present STAR measurements of the charge-dependent three-particlecorrelator $\gamma^{a,b}=\langle\cos(\phi_1^{a}+\phi_2^{b}-2\phi_3)\rangle/v_{2}\{2\}$ and elliptic flow$v_{2}\{2\}$ in U+U, Au+Au and p+Au collisions at RHIC. The difference $\Delta\gamma = \gamma(\rm{opposite\!-\!sign})\!-\!\gamma(\rm{same\!-\!sign})$measures charge separation across the reaction plane, a predicted signal of theChiral Magnetic Effect (CME). Although charge separation has been observed, ithas been argued that the measured separation can also be explained by ellipticflow related backgrounds. In order to separate the two effects, we performmeasurements of the $\gamma$-correlator where background expectations differfrom magnetic field driven effects. A differential measurement of $\gamma$ withthe relative pseudorapidity ($\Delta\eta$) between the first and secondparticles indicate that $\Delta \gamma$ in peripheral A+A and p+A collisionsare dominated by short-range correlations in $\Delta\eta$. However, arelatively wider component of the correlation in $\Delta\eta$ tends to vanishthe same way as projected magnetic field as predicted by MC-Glaubersimulations.

Disentangling flow and signals of Chiral Magnetic Effect in U+U, Au+Au and p+Au collisions