Results for $R_{2}(\eta^{\rm a}, \eta^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of transverse momentum, with $1.8 < \eta^{\rm b} < 3.2$ and for V0A 0--20% (red squares), 20-40 % (blue circles) and 40-60% (green diamonds). Statistical (systematic) uncertainties are represented by vertical bars (filled boxes). Calculations from AMPT with string melting and 3DGlauber+MUSIC+UrQMD are shown as textured and plain bands, respectively.