{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.139915.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2649979"}},{"@id":"https://doi.org/10.1103/PhysRevX.14.011028","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2024","description":"Non-central collisions between ultra-relativistic heavy nuclei can produce strong magnetic fields on the order of $10^{18}$ Gauss, and the evolution of the electromagnetic field could leave an imprint on the final-state particles. In particular, particles and anti-particles with opposite charges will receive opposite contributions to their rapidity-odd directed flow, $v_1(\\mathsf{y})$. Here we present the charge-dependent measurements of $dv_1/d\\mathsf{y}$ near midrapidity for  $\\pi^{\\pm}$, $K^{\\pm}$, and $p(\\bar{p})$ in Au+Au and isobar ($_{44}^{96}$Ru+$_{44}^{96}$Ru and  $_{40}^{96}$Zr+$_{40}^{96}$Zr) collisions at $\\sqrt{s_{NN}}=$ 200 GeV, and in Au+Au at 27 GeV, recorded by the STAR detector at the Relativistic Heavy Ion Collider. The combined dependence of the $v_1$ signal on collision system, particle species, and collision centrality can be qualitatively and semi-quantitatively understood as several effects on constituent quarks. While the results in central events can be explained by the $u$ and $d$ quarks transported from initial-state nuclei, those in peripheral events reveal the contributions from the Faraday induction and Coulomb effect for the first time in heavy-ion collisions.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t1","@type":"Dataset","description":"Directed flow of $p$ and $\\bar{p}$ vs rapidity in Au+Au 200 GeV 50-80% centrality.","name":"Figure 5a"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t2","@type":"Dataset","description":"Directed flow of $p$ and $\\bar{p}$ vs rapidity in Zr+Zr and Ru+Ru 200 GeV (combined) 50-80% centrality.","name":"Figure 5b"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t3","@type":"Dataset","description":"Directed flow of $p$ and $\\bar{p}$ vs rapidity in Au+Au 27 GeV 50-80% centrality.","name":"Figure 5c"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t4","@type":"Dataset","description":"\\Delta v_1 between proton and anti-proton vs rapidity in Au+Au 200 GeV 50-80% centrality.","name":"Figure 5d"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t5","@type":"Dataset","description":"\\Delta v_1 between proton and anti-proton vs rapidity in Zr+Zr and Ru+Ru (combined) 200 GeV 50-80% centrality.","name":"Figure 5e"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t6","@type":"Dataset","description":"\\Delta v_1 between proton and anti-proton vs rapidity in Au+Au 27 GeV 50-80% centrality.","name":"Figure 5f"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t7","@type":"Dataset","description":"\\Delta dv1/dy as a function of centrality in Au+Au 200 GeV.","name":"Figure 6a"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t8","@type":"Dataset","description":"\\Delta dv1/dy as a function of centrality in Ru+Ru and Zr+Zr 200 GeV","name":"Figure 6b"},{"@id":"https://doi.org/10.17182/hepdata.139915.v1/t9","@type":"Dataset","description":"\\Delta dv1/dy as a function of centrality in Au+Au 27 GeV.","name":"Figure 6c"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2649979?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/139915"}],"inLanguage":"en","name":"Observation of the electromagnetic field effect via charge-dependent directed flow in heavy-ion collisions at the Relativistic Heavy Ion Collider","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2649979?version=1","version":1}