Single-parton scattering versus double-parton scattering in the production of two $c\bar{c}$ pairs and charmed meson correlations at the LHC

Abstract

We compare results of exact calculations of single parton scattering (SPS) and double parton scattering (DPS) for production of $c\bar{c}c\bar{c}$ and for $D$ meson correlations. The SPS calculations are performed in collinear approximation with exact matrix element for $gg\to c\bar{c}c\bar{c}$ and $q\bar{q}\to c\bar{c}c\bar{c}$ subprocesses. It is shown that the contribution of gluon-gluon subprocess is about factor 50 larger than that for quark-antiquark annihilation. The new results are compared with results of previous calculation with the approximate matrix element for $gg\to c\bar{c}c\bar{c}$ in the high-energy approximation. The cross section for the present exact calculation is bigger only at small invariant masses and small rapidity difference between two $c$ quarks (or two $\bar{c}$ antiquarks). We compare correlations in rapidities of two $c$ (or two $\bar{c}$) for DPS and SPS contributions. Finally we compare our predictions for $D$ mesons with recent results of the LHCb collaboration for invariant mass, rapidity distance between mesons and dimeson invariant mass. The predicted shapes are similar to the measured ones, however, some strength seems to be lacking. Our new calulations clearly confirm the dominance of DPS in the production of events with double charm.

12 pages, 12 figures

References in corpus (7)

• Helac-Phegas: a generator for all parton level processes
• The four jet production at LHC and Tevatron in QCD
• Study of double parton scattering using W + 2-jet events in proton-proton collisions at sqrt(s) = 7 TeV
• Correlations in double parton distributions at small x
• Heavy Flavour Production at Tevatron and Parton Shower Effects
• Nonphotonic electrons at RHIC within $k_t$-factorization approach and with experimental semileptonic decay functions
• Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC

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