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Observation of double charm production involving open charm in pp collisions at √s = 7 TeV
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LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Observation of double charm production involving open charm in pp collisions at √s = 7 TeV. Journal of High Energy Physics, Volume 2012 (Number 6). Article number 38. doi:10.1007/JHEP06(2012)141 ISSN 1029-8479.
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Official URL: http://dx.doi.org/10.1007/JHEP06(2012)141
Abstract
The production of J/Ψ mesons accompanied by open charm, and of pairs of open charm hadrons are observed in pp collisions at a centre-of-mass energy of 7TeV using an integrated luminosity of 355 pb -1 collected with the LHCb detector. Model independent measurements of absolute cross-sections are given together with ratios to the measured J/Ψ and open charm cross-sections. The properties of these events are studied and compared to theoretical predictions.
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