{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.135498.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2150453"}},{"@id":"https://doi.org/10.1007/JHEP11(2022)011","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"NA62 Collaboration"},"creator":{"@type":"Organization","name":"NA62 Collaboration"},"datePublished":"2022","description":"CERN-NA-062. A sample of $2.8 \\times 10^4$ $K^+ \\to \\pi^+ \\mu^+ \\mu^-$ candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017--2018. The model-independent branching fraction is measured to be $(9.15 \\pm 0.08)\\times 10^{-8}$, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at $\\mathcal{O}(p^6)$.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.135498.v1/t1","@type":"Dataset","description":"Reconstructed $K^+ \\to \\pi^+ \\mu^+ \\mu^-$ differential decay width. Only statistical errors are provided. The 4-body differential decay width (shown...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.135498.v1/t2","@type":"Dataset","description":"Reconstructed squared modulus of the $K^+ \\to \\pi^+ \\mu^+ \\mu^-$ form factor. Only statistical errors are provided.","name":"Table 2"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2150453?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/135498"}],"inLanguage":"en","name":"A measurement of the $K^{+} \\to \\pi^{+} \\mu^{+} \\mu^{-}$ decay","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2150453?version=1","version":1}