Open charm production in Double Parton Scattering processes in the forward kinematics
arXiv:1608.00014 · doi:10.1140/epjc/s10052-016-4551-5
Abstract
We calculate the rate of double open charm production in the forward kinematics studied recently in the LHCb experiment. We find that the mean field approximation for the double parton GPD (Generalized parton distributions), which neglects parton - parton correlations, underestimates the rate by a factor of two. The enhancement due to the perturbative QCD correlation \12 mechanism which explains the rate of double parton interactions at the central rapidities is found to explain 60 80 \% of the discrepancy. We argue that the nonperturbative fluctuations leading to non-factorized (correlated) contributions to the initial conditions for the DGLAP collinear evolution of the double parton GPD play an important role in this kinematics. Combined, the two correlation mechanisms provide a good description of the rate of double charm production reported by the LHCb. We also give predictions for the variation of the \effs (i.e. the ratio of double and square of single inclusive rates) in the discussed kinematics as a function of . The account for two correlation mechanisms strongly reduces sensitivity of the results to the starting point of the QCD evolution.
arXiv comment9 figures, 19 pages. Several misprints were eliminated, to be published in Eur. J. of Physics, C
References in corpus (23)
- Total cross sections
- Double Parton Distributions Incorporating Perturbative QCD Evolution and Momentum and Quark Number Sum Rules
- Elements of a theory for multiparton interactions in QCD
- pQCD Physics of multiparton interactions
- Double parton interactions in photon+3 jet events in ppbar collisions sqrt{s}=1.96 TeV
- The four jet production at LHC and Tevatron in QCD
- Same-sign W pair production as a probe of double parton scattering at the LHC
- Measurement of underlying event characteristics using charged particles in pp collisions at and 7 TeV with the ATLAS detector
- Double Parton Scattering Singularity in One-Loop Integrals
- Two-gluon form factor of the nucleon and photoproduction
- Observation and studies of double J/psi production at the Tevatron
- Dijet production as a centrality trigger for p-p collisions at CERN LHC
- Cancellation of Glauber gluon exchange in the double Drell-Yan process
- Transverse nucleon structure and diagnostics of hard parton-parton processes at LHC
- Measurement of J/psi and psi(2S) prompt double-differential cross sections in pp collisions at sqrt(s) = 7 TeV
- Diffraction Dissociation in Photoproduction at HERA
- Conventional versus single-ladder-splitting contributions to double parton scattering production of two quarkonia, two Higgs bosons and
- Azimuthal decorrelations and multiple parton interactions in photon+2 jet and photon+3 jet events in ppbar collisions at sqrt{s}=1.96 TeV
- Single-parton scattering versus double-parton scattering in the production of two pairs and charmed meson correlations at the LHC
- Electroweak boson production in double parton scattering
- Production of two charm quark-antiquark pairs in single-parton scattering within the -factorization approach
- Simultaneous production of charmonium and bottomonium mesons at LHC
- Double parton scattering: Impact of nonperturbative parton correlations
Cited by in corpus (11)
- Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC
- Complete NLO QCD study of single- and double-quarkonium hadroproduction in the colour-evaporation model at the Tevatron and the LHC
- Quark correlations in the Color Glass Condensate: Pauli blocking and the ridge
- Double D-meson production in proton-proton and proton-lead collisions at the LHC
- Probing impact-parameter dependent nuclear parton densities from double parton scatterings in heavy-ion collisions
- Revealing minijet dynamics via centrality dependence of the double parton interactions in proton-nucleus interactions
- Momentum sum rule and factorization of double parton distributions
- Interplay of soft and perturbative correlations in multiparton interactions at central rapidities
- Probing double parton scattering via associated open charm and bottom production in ultraperipheral collisions
- Valence and sea parton correlations in double parton scattering from data
- DPS mechanism for associated production in UPCs