Measurements of second-harmonic Fourier coefficients from azimuthal anisotropies in p+p, p+Au, d+Au, and He3+Au collisions at sNN=200 GeV

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Recently, the PHENIX Collaboration has published second- and third-harmonic Fourier coefficients ${v}_{2}$ and ${v}_{3}$ for midrapidity $(|\ensuremath{\eta}|<0.35)$ charged hadrons in 0%--5% central $p+\mathrm{Au}$, $d+\mathrm{Au}$, and $^{3}\mathrm{He}+\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV, utilizing three sets of two-particle correlations for two detector combinations with different pseudorapidity acceptance [Acharya et al., Phys. Rev. C 105, 024901 (2022)]. This paper extends these measurements of ${v}_{2}$ to all centralities in $p+\mathrm{Au}$, $d+\mathrm{Au}$, and $^{3}\mathrm{He}+\mathrm{Au}$ collisions, as well as $p+p$ collisions, as a function of transverse momentum (${p}_{T}$) and event multiplicity. The kinematic dependence of ${v}_{2}$ is quantified as the ratio $R$ of ${v}_{2}$ between the two detector combinations as a function of event multiplicity for $0.5<{p}_{T}<1$ and $2<{p}_{T}<2.5\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}/c$. A multiphase-transport (AMPT) model can reproduce the observed ${v}_{2}$ in most-central to midcentral $d+\mathrm{Au}$ and $^{3}\mathrm{He}+\mathrm{Au}$ collisions. However, the AMPT model systematically overestimates the measurements in $p+p$, $p+\mathrm{Au}$, and peripheral $d+\mathrm{Au}$ and $^{3}\mathrm{He}+\mathrm{Au}$ collisions, indicating a higher nonflow contribution in the AMPT model than in the experimental data. The AMPT model fails to describe the observed $R$ for $0.5<{p}_{T}<1\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}/c$, but there is qualitative agreement with the measurements for $2<{p}_{T}<2.5\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}/c$.

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