On the understanding and use of "unintegrated" parton distributions in small-x QCD

Abstract

We review and discuss the use of TMD, or "unintegrated", gluon distributions in the domain of small-x physics. The definitions employed, and the hazards of the naive applications of the TMD factorization and the associated gluon distributions are discussed.

10 pages, based on talk give at the workshop "QCD evolution of parton distributions: from collinear to non-collinear case", 8 - 9 Apr 2011

References in corpus (4)

• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• What exactly is a parton density?
• Gluon saturation and energy dependence of hadron multiplicity in pp and AA collisions at the LHC
• A model for gluon production in heavy-ion collisions at the LHC with rcBK unintegrated gluon densities

Cited by in corpus (21)

• TMDlib2 and TMDplotter: a platform for 3D hadron structure studies
• CASCADE3 A Monte Carlo event generator based on TMDs
• Small-$x$ dynamics in forward-central dijet decorrelations at the LHC
• Wilson lines and gauge invariant off-shell amplitudes
• Transition between soft physics at LHC and low-x physics at HERA
• Longitudinal momentum shifts, showering and nonperturbative corrections in matched NLO-shower event generators
• Drell-Yan lepton pair production at LHC and TMD quark densities of the proton
• LHC soft physics and TMD gluon density at low x
• Towards the global fit of the TMD gluon density in the proton from the LHC data
• High-luminosity Large Hadron Collider with laser-cooled isoscalar ion beams
• TMD PDFs: a Monte Carlo implementation for the sea quark distribution
• Employing RHIC and LHC data to determine TMD gluon density in a proton
• Collinearity approximations and kinematic shifts in partonic shower algorithms
• Three jet production and gluon saturation effects in p-p and p-Pb collisions within high-energy factorization
• Significance of non-perturbative input to TMD gluon density for hard processes at LHC
• Nonperturbative corrections and showering in NLO-matched event generators
• Next-to-Leading Order correction to inclusive particle spectra in the Color Glass Condensate framework
• Small x physics and hard QCD processes at LHC
• TMD parton densities in associated real and virtual photon and jet production at LHC
• Soft Gluons and Jets at the LHC
• TMD PDFs in Drell-Yan lepton pair production at LHC