{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.103057.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1641113"}},{"@id":"https://doi.org/10.1103/PhysRevC.98.014915","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2021","description":"The azimuthal anisotropic flow of identified and unidentified charged particles has been systematically studied in Cu+Au collisions at $\\sqrt{s_{_{NN}}}$ = 200 GeV for harmonics $n=$ 1-4 in the pseudorapidity range $|\\eta|<1$. The directed flow in Cu+Au collisions is compared with the rapidity-odd and, for the first time, the rapidity-even components of charged particle directed flow in Au+Au collisions at $\\sqrt{s_{_{NN}}}$ = 200~GeV. The slope of the directed flow pseudorapidity dependence in Cu+Au collisions is found to be similar to that in Au+Au collisions, with the intercept shifted toward positive $\\eta$ values, i.e., the Cu-going direction. The mean transverse momentum projected onto the spectator plane, $\\langle p_x\\rangle$, in Cu+Au collision also exhibits approximately linear dependence on $\\eta$ with the intercept at about $\\eta\\approx-0.4$, closer to the rapidity of the Cu+Au system center-of-mass. The observed dependencies find natural explanation in a picture of the directed flow originating partly due the \"tilted source\" and partly due to the rapidity dependent asymmetry in the initial density distribution. Charge-dependence of the $\\langle p_x\\rangle$ was also observed in Cu+Au collisions, indicating an effect of the initial electric field created by charge difference of the spectator protons in two colliding nuclei. The rapidity-even component of directed flow in Au+Au collisions is close to that in Pb+Pb collisions at $\\sqrt{s_{_{NN}}}$ = 2.76 TeV, indicating a similar magnitude of dipole-like fluctuations in the initial-state density distribution. Higher harmonic flow in Cu+Au collisions exhibits similar trends to those observed in Au+Au and Pb+Pb collisions and is qualitatively reproduced by a viscous hydrodynamic model and a multi-phase transport model. For all harmonics with $n\\ge2$ we observe an approximate scaling of $v_n$ with the number of constituent quarks.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t1","@type":"Dataset","description":"Directed flow $v_1(\\eta)$ and $(\\eta)$ of charged particles measured with respect to the target and projectile spectator planes in 10%-40%...","name":"Figure 4ab"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t2","@type":"Dataset","description":"Directed flow $v_1(\\eta)$ and $(\\eta)$ of charged particles measured with respect to the target and projectile spectator planes in 10%-40%...","name":"Figure 4cd"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t3","@type":"Dataset","description":"Conventional and fluctuation components of directed flow $v_1(\\eta)$ and momentum shift $/(\\eta)$ of charged particles in 10%-40% centrality for Cu+Au...","name":"Figure 5"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t4","@type":"Dataset","description":"Slopes and intercepts of $/(\\eta)$ in Cu+Au and Au+Au collisions.","name":"Figure 6ab"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t5","@type":"Dataset","description":"Slopes and intercepts of $v_1(\\eta)$ in Cu+Au and Au+Au collisions.","name":"Figure 6cd"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t6","@type":"Dataset","description":"Centrality dependence of $v_1^{fluc(even)}$ and $/$ in Cu+Au and Au+Au collisions.","name":"Figure 7"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t7","@type":"Dataset","description":"$p_T$ dependence of $v_1^{fluc(even)}$ and $v_1^{conv(odd)}$ in Cu+Au and Au+Au collisions.","name":"Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t8","@type":"Dataset","description":"$p_T$ dependence of $v_1$ measured with three-point correlator in Cu+Au collisions","name":"Figure 9a.1"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t9","@type":"Dataset","description":"$p_T$ dependence of $v_1$ measured with three-point correlator in Cu+Au collisions","name":"Figure 9a.2"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t10","@type":"Dataset","description":"$\\eta$ dependence of $v_1$ measured with three-point correlator in Cu+Au collisions","name":"Figure 9b"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t11","@type":"Dataset","description":"Directed flow $v_1(p_T)$ of $\\pi^+ + \\pi^-$ in Cu+Au collisions.","name":"Figure 10.1"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t12","@type":"Dataset","description":"Directed flow $v_1(p_T)$ of $K^++K^-$ in Cu+Au collisions.","name":"Figure 10.2"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t13","@type":"Dataset","description":"Directed flow $v_1(p_T)$ of $p+\\bar{p}$ in Cu+Au collisions.","name":"Figure 10.3"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t14","@type":"Dataset","description":"Centrality dpendence of $$ of positively and negatively charged particles and its differece in Cu+Au and Au+Au collisions.","name":"Figure 11"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t15","@type":"Dataset","description":"Higher harmonic flow coefficients $v_n{\\Psi_n}$ of charged particles for different centrality bins in Cu+Au collisions.","name":"Figure 13.1"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t16","@type":"Dataset","description":"Higher harmonic flow coefficients of charged particles for different centrality bins in Cu+Au collisions.","name":"Figure 13.2"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t17","@type":"Dataset","description":"Higher harmonic flow coefficients $v_n{\\Psi_n}$ of charged particles for different centrality bins in Cu+Au collisions.","name":"Figure 13.3"},{"@id":"https://doi.org/10.17182/hepdata.103057.v1/t18","@type":"Dataset","description":"Higher harmonic flow coefficients $v_n$ of charged particles for two selected $p_T$ bins as a function of the number of...","name":"Figure 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