% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Aad:221708, author = {Aad, Georges and others}, collaboration = {{ATLAS Collaboration}}, title = {{O}bservation 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 {T}e{V} with the {ATLAS} detector}, journal = {The European physical journal / C}, volume = {75}, number = {5}, issn = {1434-6052}, address = {Berlin}, publisher = {Springer}, reportid = {PUBDB-2015-02788, CERN-PH-EP-2014-276}, pages = {229}, year = {2015}, note = {OA}, abstract = {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.}, cin = {ATLAS}, ddc = {530}, cid = {I:(DE-H253)ATLAS-20120731}, pnm = {Experiments at LHC (ATLAS) (POF2-512)}, pid = {G:(DE-H253)POF2-LHC-Exp.-(ATLAS)-20130405}, experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101}, typ = {PUB:(DE-HGF)29 / PUB:(DE-HGF)16}, eprint = {1412.6428}, howpublished = {arXiv:1412.6428}, archivePrefix = {arXiv}, SLACcitation = {$\%\%CITATION$ = $arXiv:1412.6428;\%\%$}, UT = {WOS:000355680900005}, pubmed = {pmid:26041977}, doi = {10.1140/epjc/s10052-015-3406-9}, url = {https://bib-pubdb1.desy.de/record/221708}, }