Double-parton scattering contribution to production of jet pairs with large rapidity separation at the LHC

Abstract

We discuss production of four-jet final state $pp\to jjjjX$ in proton-proton collisions at the LHC through the mechanism of double-parton scattering (DPS) in the context of jets with large rapidity separation. The DPS contributions are calculated within the so-called factorized Ansatz and each step of DPS is calculated in the LO collinear approximation. The LO pQCD calculations are shown to give a reasonably good descritption of recent CMS and ATLAS data on inclusive jet production and therefore this formalism can be used to reliably estimate the DPS effects. Relative contribution of DPS is growing at large rapidity distance between jets. This is consistent with our experience from previous studies of double-parton scattering effects in the case of open and hidden charm production. The calculated differential cross sections as a function of rapidity distance between the most remote in rapidity jets are compared with recent results of LL and NLL BFKL calculations for Mueller-Navelet (MN) jet production at $\sqrt{s}=7$ TeV. The DPS contribution to widely rapidity separated jet production is carefully studied for the present energy $\sqrt{s}$ = 7 TeV and also at the nominal LHC energy $\sqrt{s}$ = 14 TeV and in different ranges of jet transverse momenta. The differential cross section as a function of dijet transverse momenta as well as two-dimensional ($p_T(y_{min})\times p_T(y_{max})$)-plane correlations for DPS mechanism are also presented. Some ideas how the DPS effects could be studied in the case of double dijet production are suggested.

11 pages, 8 figures

References in corpus (10)

• Parton distributions for the LHC
• Hard Interactions of Quarks and Gluons: a Primer for LHC Physics
• Theoretical considerations on multiparton interactions in QCD
• Second order QCD corrections to jet production at hadron colliders: the all-gluon contribution
• The azimuthal decorrelation of jets widely separated in rapidity as a test of the BFKL kernel
• Azimuthal decorrelation of Mueller-Navelet jets at the Tevatron and the LHC
• Correlations in double parton distributions at small x
• Angular correlations in the double Drell-Yan process
• Jet-jet and hadron-jet correlations in hadro- and electro-production
• Dijet correlations at RHIC, leading-order $k_t$-factorization approach versus next-to-leading order collinear approach

Cited by in corpus (8)

• Search for optimal conditions for exploring double-parton scattering in four-jet production: $k_t$-factorization approach
• Unintegrated double parton distributions
• Momentum sum rule and factorization of double parton distributions
• Double parton scattering in four-jet production in proton-proton collisions at the LHC
• High-energy resummation in semi-hard processes at the LHC
• Inclusive four-jet production: a study of Multi-Regge kinematics and BFKL observables
• Production of dijets with large rapidity separation: Mueller-Navelet mechanism versus double-parton scattering
• Four-jet production in the $k_t$-factorisation