Production of associated Y and open charm hadrons in pp collisions at √s = 7 and 8 TeV via double parton scattering

Associated production of bottomonia and open charm hadrons in pp collisions at s=7 and 8 TeV is observed using data corresponding to an integrated luminosity of 3 fb ⁻¹ accumulated with the LHCb detector. The observation of five combinations, Y(1S)D ⁰, Y(2S)D ⁰, Y(1S)D ⁺, Y(2S)D ⁺ and Y(1S)D _s ⁺, is reported. Production crosssections are measured for Y(1S)D ⁰ and Y(1S)D ⁺ pairs in the forward region. The measured cross-sections and the differential distributions indicate the dominance of double parton scattering as the main production mechanism.[Figure not available: see fulltext.]