@Article{ATLASCollaborationAad_etal2015,
author="ATLAS Collaboration (Aad, G. et al
and Cabrera Urban, S.
and Castillo Gimenez, V.
and Costa, M. J.
and Fernandez Martinez, P.
and Ferrer, A.
and Fiorini, L.
and Fuster, J.
and Garcia, C.
and Garcia Navarro, J. E.
and Gonzalez de la Hoz, S.
and Hernandez Jimenez, Y.
and Higon-Rodriguez, E.
and Irles Quiles, A.
and Jimenez Pena, J.
and Kaci, M.
and King, M.
and Lacasta, C.
and Lacuesta, V. R.
and Marti-Garcia, S.
and Mitsou, V. A.
and Moles-Valls, R.
and Oliver Garcia, E.
and Pedraza Lopez, S.
and Perez Garcia-Esta{\~A}{\textpm}, M. T.
and Romero Adam, E.
and Ros, E.
and Salt, J.
and Sanchez Martinez, V.
and Soldevila, U.
and Sanchez, J.
and Torro Pastor, E.
and Valero, A.
and Valladolid Gallego, E.
and Valls Ferrer, J. A.
and Vos, M.",
title="Observation and measurements of the production of prompt and non-prompt J/psi mesons in association with a Z boson in pp collisions at root s=8 TeV with the ATLAS detector",
journal="European Physical Journal C",
year="2015",
publisher="Springer",
volume="75",
number="5",
pages="229--29pp",
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 fb(-1) of data collected with theATLAS experiment at the LHC in pp collisions at root s = 8 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 (-> mu(+) mu(-)) are measured relative to the inclusive production rate of Z bosons in the same fiducial volume to be (36.8 +/- 6.7 +/- 2.5) x 10(-7) and (65.8 +/- 9.2 +/- 4.2) x 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) mb at 68 (95){\%} confidence level is placed on the effective cross-section regulating double parton interactions.",
optnote="WOS:000355680900005",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2269), last updated on Thu, 02 Jul 2015 18:16:26 +0000",
issn="1434-6044",
doi="10.1140/epjc/s10052-015-3406-9",
opturl="http://arxiv.org/abs/1412.6428",
opturl="https://doi.org/10.1140/epjc/s10052-015-3406-9",
archivePrefix="arXiv",
eprint="1412.6428",
language="English"
}