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Observation of double charm production involving open charm in pp collisions at s=7 TeV

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Original languageEnglish
Article number141
Number of pages1
JournalJournal of High Energy Physics
Issue number141
Early online date4 May 2012
Publication statusPublished - Jun 2012


he 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 7 TeV 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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