{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.73284.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1335136"}},{"@id":"https://doi.org/10.1140/epjc/s10052-015-3406-9","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2016","description":"CERN-LHC.  The production of a $Z$ boson in association with a $J/\\psi$ meson in proton-proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple parton scattering. Using $20.3\\, \\mathrm{fb^{-1}}$ of data collected with the ATLAS experiment at the LHC in $pp$ collisions at $\\sqrt{s}=8\\, \\mathrm{TeV}$, the first measurement of associated $Z + J/\\psi$ production is presented for both prompt and non-prompt $J/\\psi$ production, with both signatures having a significance in excess of $5\\sigma$. The inclusive production cross-sections for $Z$ boson production (analysed in $\\mu^+\\mu^-$ or $e^+e^-$ decay modes) in association with prompt and non-prompt $J/\\psi(\\to\\mu^+\\mu^-)$ are measured relative to the inclusive production rate of $Z$ bosons in the same fiducial volume to be $(36.8\\pm 6.7\\pm 2.5) \\times 10^{-7}$ and $(65.8\\pm 9.2\\pm 4.2) \\times 10^{-7}$ respectively. Normalised differential production cross-section ratios are also determined as a function of the $J/\\psi$ transverse momentum. The fraction of signal events arising from single and double parton scattering is estimated, and a lower limit of $5.3\\ (3.7)\\, \\mathrm{mb}$ at $68\\ (95)$% confidence level is placed on the effective cross-section regulating double parton interactions.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t1","@type":"Dataset","description":"The fiducial, inclusive (SPS+DPS) and DPS-subtracted differential cross-section ratio $R_{Z+J/\\psi}$ for prompt $J/\\psi$.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t2","@type":"Dataset","description":"The fiducial, inclusive (SPS+DPS) and DPS-subtracted differential cross-section ratio $R_{Z+J/\\psi}$ for non-prompt $J/\\psi$.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t3","@type":"Dataset","description":"The fiducial, inclusive (SPS+DPS) and DPS-subtracted differential cross-section ratio $\\mathrm{d}R_{Z+J/\\psi}/\\mathrm{d}y$ as a function of $y_{J/\\psi}$ for prompt $J/\\psi$.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t4","@type":"Dataset","description":"The fiducial, inclusive (SPS+DPS) and DPS-subtracted differential cross-section ratio $\\mathrm{d}R_{Z+J/\\psi}/\\mathrm{d}y$ as a function of $y_{J/\\psi}$ for non-prompt $J/\\psi$.","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t5","@type":"Dataset","description":"The inclusive (SPS+DPS) cross-section ratio $\\mathrm{d}R_{Z+J/\\psi}^\\mathrm{incl}/\\mathrm{d}p_\\mathrm{T}$ for prompt and non-prompt $J/\\psi$. Estimated DPS contributions for each bin, based on the...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.73284.v1/t6","@type":"Dataset","description":"The inclusive (SPS+DPS) cross-section ratio $\\mathrm{d}R_{Z+J/\\psi}^\\mathrm{incl}/\\mathrm{d}p_\\mathrm{T}$ for prompt and non-prompt $J/\\psi$. Estimated DPS contributions for each bin, based on the...","name":"Table 6"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1335136?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/73284"}],"inLanguage":"en","name":"Observation and measurements of the production of prompt and non-prompt $J/\\psi$ mesons in association with a $Z$ boson in $pp$ collisions at $\\sqrt{s}= 8$ TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1335136?version=1","version":1}