Double open charm meson production at the LHC: new single- and double-parton scattering mechanisms
1 Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, PL-31-342 Kraków, Poland
2 University of Rzeszów, PL-35-959 Rzeszów, Poland
* e-mail: email@example.com, supported by the Polish National Science Center grant DEC-2014/15/B/ST2/02528
Published online: 29 November 2016
We discuss D0D0 meson-meson pair production related to the recent LHCb experimental results obtained at √s = 7 TeV. We consider double-parton scattering (DPS) mechanisms of double cc̄ production and subsequent standard cc → D0D0 scale-independent hadronization as well as double g and mixed gcc̄ production with gg → D0D0 and gc → D0D0 scale-dependent hadronization. The latter scenario with g → D0 fragmentation components results in a new single-parton scattering (SPS) mechanism of digluon production which is also taken here into account. Results of the numerical calculations are compared with the LHCb data for correlation observables in azimuthal angle φD0D0 between D0 mesons, in dimeson invariant mass MD0D0 and in transverse momentum of the meson from the D0D0 pair. The inclusion of the new mechanisms with g → D0 fragmentation leads to a larger cross sections and to slightly different shapes of the calculated correlation observables.
© The Authors, published by EDP Sciences, 2016
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