{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.130708.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/693873"}},{"@id":"https://doi.org/10.1103/PhysRevLett.95.261803","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CLEO Collaboration"},"creator":{"@type":"Organization","name":"CLEO Collaboration"},"datePublished":"2022","description":"A precise measurement of the cross section of the process $e^+e^- \\to \\pi^+\\pi^-(\\gamma)$ from threshold to an energy of $3$ GeV is obtained with the initial-state radiation (ISR) method using $232$ fb$^{-1}$ of data collected with the BaBar detector at $e^+e^-$ center-of-mass energies near $10.6$ GeV. The ISR luminosity is determined from a study of the leptonic process $e^+e^-\\to\\mu^+\\mu^-(\\gamma)\\gamma_{\\rm ISR}$, which is found to agree with the next-to-leading-order QED prediction to within 1.1\\%. The cross section for the process $e^+e^-\\to\\pi^+\\pi^-(\\gamma)$ is obtained with a systematic uncertainty of 0.5\\% in the dominant $\\rho$ resonance region. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the measured $\\pi\\pi$ cross section from threshold to $1.8$ GeV is $(514.1 \\pm 2.2({\\rm stat}) \\pm 3.1({\\rm syst}))\\times 10^{-10}$.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.130708.v1/t1","@type":"Dataset","description":"Born cross section of $e^+e^-\\rightarrow h^+h^-$","name":"Born cross-section"},{"@id":"https://doi.org/10.17182/hepdata.130708.v1/t2","@type":"Dataset","description":"Timelike form factor","name":"Timelike form factor"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins693873?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/130708"}],"inLanguage":"en","name":"Precision measurements of the timelike electromagnetic form factors of pion, kaon, and proton.","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins693873?version=1","version":1}