Observation of flow vector fluctuations in p$-$Pb collisions at $\sqrt{\textit{s}_{_{\bf NN}}}= 5.02$ TeV
- Abdallah, Dana Ali Hassan et al
- arXiv:2602.10645CERN-EP-2026-014
 | The ratio $v_2\{{\rm 2PC}\}/v_2[{\rm 2PC}]$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of transverse momentum (red points). Statistical (systematic) uncertainties are represented by solid bars (filled boxes). Calculations from AMPT with string melting and 3DGlauber+MUSIC+UrQMD are shown as textured and plain bands, respectively. |
 | The ratio $v_2\{{\rm 2PC}\}/v_2[{\rm 2PC}]$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of transverse momentum, for 0--20\% V0A (red points), 20--40\% V0A (blue points) and 40--60\% V0A (green points) (top panel). The ratio with respect to the measurements in 0--20\% V0A is also presented (bottom panel). 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. The ratio results from AMPT are not shown in the bottom panel due to excessively large statistical uncertainties. |
 | Results for $r_2(p_{\rm T}^{\rm a},p_{\rm T}^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of transverse momentum (red points). The different panels display results for different $\pt^{\rm a}$ ranges. 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. |
 | Results for $r_2(p_{\rm T}^{\rm a},p_{\rm T}^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of transverse momentum for 0--20\% V0A (red points), 20--40\% V0A (blue points) and 40--60\% V0A (green points). Statistical (systematic) uncertainties are represented by vertical bars (filled boxes). Calculations from 3DGlauber+MUSIC+UrQMD are shown as plain bands. The results from AMPT are not shown due to excessively large statistical uncertainties. |
 | Results for $R_{2}(\eta^{\rm a}, \eta^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of $|\eta^{\rm a}|$ (red squares). Statistical (systematic) uncertainties are represented by vertical bars (filled boxes). Calculations from AMPT with string melting and 3DGlauber+MUSIC+UrQMD are shown as filled shadows and solid lines. |
 | Results for $R_{2}(\eta^{\rm a}, \eta^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of $|\eta^{\rm a}|$ with $1.8<|\eta^{\rm b}|<2.6$ (blue stars) and $2.6<|\eta^{\rm b}|<3.2$ (red crosses). 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. |
 | 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. |