Abstract
We present predictions of single inclusive jet transverse momentum, energy, and Feynman-x spectra at forward rapidity (5.2<y<6.6) in proton–proton collisions with s=7 and 13 TeV. Calculations based on high-energy factorization and kT-dependent parton densities are compared to simulations using the Pythia event generator. Effects from parton density evolution, parton shower dynamics, multi-parton interactions, and saturation of parton densities are investigated.
Highlights
The study of single inclusive forward jet production allows to investigate various aspects of hadron–hadron scattering
In this paper we discuss some of the open questions raised above, and we present predictions of single inclusive jet transverse momentum, energy, and Feynman-x sp√ectra with rapidity 5.2 < y < 6.6 in proton–proton collisions at s = 7 and 13 TeV
Calculations in high-energy factorization (HEF) with nonlinearities included predict a suppression of the cross section at low pT and low energy scales relative to the calculations that neglect nonlinearities
Summary
The study of single inclusive forward jet production allows to investigate various aspects of hadron–hadron scattering. At large rapidity, the transverse momentum of the jet is kinematically bound to small values, making this process very sensitive to the modeling of the underlying event (i.e. initial and final state parton showers, multi-parton interactions, and beam remnant fragmentation), regularization of the partonic cross section, and (perturbative) saturation [1] of parton densities. Matrix elements for single inclusive jet production are given as a 2 → 1 process with one of the incoming partons being off-shell In this formalism the parton densities describing the large x degrees of freedom are given by the usual parton distribution functions of collinear factorization with a scale dependence given by the DGLAP evolution equations. The comparison of these two frameworks offers a hint of where the predicted phenomena are universal and where they differ
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