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

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doi:10.1007/JHEP06(2012)141

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. Copyright CERN.

Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2012). Observation of double charm production involving open charm in pp collisions at √s = 7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2012(6) [10.1007/JHEP06(2012)141].