Gauge Link Structure in Quark-Quark Correlators in hard processes

Abstract

Distribution functions in hard processes can be described by quark-quark correlators, nonlocal matrix elements of quark fields. Color gauge invariance requires inclusion of appropriate gauge links in these correlators. For transverse momentum dependent distribution functions, in particular important for describing T-odd effects in hard processes, we find that new link structures containing loops can appear in abelian and non-abelian theories. In transverse moments, e.g. measured in azimuthal asymmetries, these loops may enhance the contribution of gluonic poles. Some explicit results for the link structure are given in high-energy leptoproduction and hadron-hadron scattering.

9 pages, 9 figures

References in corpus (18)

• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• Final state interactions and gauge invariant parton distributions
• Universality of T-odd effects in single spin and azimuthal asymmetries
• Transverse Polarisation of Quarks in Hadrons
• Initial-State Interactions and Single-Spin Asymmetries in Drell-Yan Processes
• Single spin asymmetry for $p^{\uparrow }p\to \pi X$ in perturbative QCD
• Intrinsic transverse momentum and the polarized Drell-Yan process
• Bounds on transverse momentum dependent distribution and fragmentation functions
• Single spin asymmetries in transversely polarized proton(antiproton) - proton inclusive processes
• What exactly is a parton density?
• Gluon-Exchange in Spin-Dependent Fragmentation
• Color gauge invariance in the Drell-Yan process
• Transverse single spin asymmetries in Drell-Yan processes
• Quark correlation functions in deep inelastic semi-inclusive processes
• Time ordering in off-diagonal parton distributions
• Time-reversal odd fragmentation and distribution functions in pp and ep single spin asymmetries
• Evolution of transverse momentum dependent distribution and fragmentation functions

Cited by in corpus (96)

• Semi-inclusive deep inelastic scattering at small transverse momentum
• TMD Parton Distribution and Fragmentation Functions with QCD Evolution
• Universality of soft and collinear factors in hard-scattering factorization
• Relations between generalized and transverse momentum dependent parton distributions
• No Generalized TMD-Factorization in the Hadro-Production of High Transverse Momentum Hadrons
• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Single transverse-spin asymmetry in high transverse momentum pion production in pp collisions
• QCD transverse-momentum resummation in gluon fusion processes
• The Construction of Gauge-Links in Arbitrary Hard Processes
• Single-Transverse Spin Asymmetries: From DIS to Hadronic Collisions
• Transverse momentum dependent parton distributions in a light-cone quark model
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Parameterization of the quark-quark correlator of a spin-1/2 hadron
• Twist-3 Formalism for Single Transverse Spin Asymmetry Reexamined: Semi-Inclusive Deep Inelastic Scattering
• Space-like (vs. time-like) collinear limits in QCD: is factorization violated?
• Single Transverse-Spin Asymmetry in Drell-Yan Production at Large and Moderate Transverse Momentum
• Fully Unintegrated Parton Correlation Functions and Factorization in Lowest Order Hard Scattering
• Single Transverse Spin Asymmetry for Large-p_T Pion Production in Semi-Inclusive Deep Inelastic Scattering
• Single spin asymmetries in hadron-hadron collisions
• Transverse-momentum resummation for heavy-quark hadroproduction
• Simplicity from Recoil: The Three-Loop Soft Function and Factorization for the Energy-Energy Correlation
• Probing Gluonic Spin-Orbit Correlations in Photon Pair Production
• Non-universality of transverse momentum dependent parton distribution functions
• Contribution of Twist-3 Multi-Gluon Correlation Functions to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Bessel-Weighted Asymmetries in Semi Inclusive Deep Inelastic Scattering
• Soft-fermion-pole contribution to single-spin asymmetry for pion production in pp collisions
• Partonic Pole Matrix Elements for Fragmentation
• On the Origin of Model Relations among Transverse-Momentum Dependent Parton Distributions
• Azimuthal asymmetries for quark pair production in pA collisions
• An Overview of Transverse Momentum Dependent Factorization and Evolution
• Generalized Universality of Definite Rank Gluon Transverse Momentum Dependent Correlators
• Sivers effect in Drell Yan at RHIC
• Hadronic Dijet Imbalance and Transverse-Momentum Dependent Parton Distributions
• Spectral analysis of gluonic pole matrix elements for fragmentation
• General Helicity Formalism for Polarized Semi-Inclusive Deep Inelastic Scattering
• New Analysis of the Single Transverse-Spin Asymmetry for Hadron Production at RHIC
• Interplay of the CGC and TMD frameworks to all orders in kinematic twist
• On the role of Collins effect in the single spin asymmetry A_N in p(transv. polarized) p --> h X processes
• Sivers Effect and Transverse Single Spin Asymmetry in $e+p^{\uparrow }\to e+J/\psi +X$
• The Sivers single-spin asymmetry in photon-jet production
• Single Transverse-Spin Asymmetry in Hadronic Dijet Production
• Gluonic Pole Cross Sections and Single Spin Asymmetries in Hadron-Hadron Scattering
• Dihadron interference fragmentation functions in proton-proton collisions
• Drell-Yan process with jet vetoes: breaking of generalized factorization
• Single-Transverse Spin Asymmetry in Dijet Correlations at Hadron Colliders
• Constraints on the gluon Sivers distribution via transverse single spin asymmetries at midrapidity in p(transv. polarized) p -> pi^0 X processes at BNL RHIC
• Soft gluon emission at two loops in full color
• Factorization for Azimuthal Asymmetries in SIDIS at Next-to-Leading Power
• Extra Spin Asymmetries From the Breakdown of TMD-Factorization in Hadron-Hadron Collisions
• The twist-three distribution $e^q(x,k_{\perp })$ in a light-front model
• TMD gluon distributions at small x in the CGC theory
• Transverse Momentum Dependent Parton Distribution/Fragmentation Functions at an Electron-Ion Collider
• TMDs and SSAs in hadronic interactions
• Gluon TMDs in quarkonium production
• Where do we stand with a 3-D picture of the proton?
• Monte-Carlo simulation of events with Drell-Yan lepton pairs from antiproton-proton collisions
• Single transverse-spin asymmetries in forward pion production at high energy: incorporating small-x effects in the target
• Spin asymmetries in electron-jet production at the future electron ion collider
• Non-Universality of Transverse Momentum Dependent Parton Distributions at Small-x
• Generalized universality of higher transverse moments of quark transverse momentum dependent correlators
• Single spin asymmetries in l p --> h X processes: a test of factorization
• Collins Asymmetry at Hadron Colliders
• QCD and Jets at Hadron Colliders
• Sivers asymmetry of Drell-Yan production in small-$x$ regime
• 2-soft-gluon exchange and factorization breaking
• TMD factorization and the gluon distribution in high energy QCD
• Transverse single-spin asymmetries in $p^{\uparrow }p\to \gamma X$ from quark-gluon-quark correlations in the proton
• Gauge links for transverse momentum dependent correlators at tree-level
• Spin asymmetries in jet-hyperon production at LHC
• The Sivers Asymmetry in Hadronic Dijet Production
• Initial and Final State Interaction Effects in Small-x Quark Distributions
• The electron in three-dimensional momentum space
• Sivers and $\cos 2\varphi$ Asymmetries in Semi-inclusive Deep Inelastic Scattering in Light-front Holographic Model
• On the process dependent nuclear $k_{\perp }$ broadening effect
• QCD Factorization for Quarkonium Production in Hadron Collions at Low Transverse Momentum
• Color entanglement for $\gamma$-jet production in polarized pA collisions
• Polarized Lambda hyperon production in Semi-inclusive deep inelastic scattering off an unpolarized nulceon target
• Dihadron Azimuthal Correlation from Collins Effect in Unpolarized Hadron Collisions
• Operator analysis of $p_T$-widths of TMDs
• Universality of Quark and Gluon TMD Correlators
• Sivers and Collins Single Spin Asymmetries
• Azimuthal angle dependence of di-jet production in unpolarized hadron scattering
• Average transverse momentum quantities approaching the lightfront
• Twist Three Distribution f_\perp(x,k^\perp) in Light-front Hamiltonian Approach
• Analogies between hadron-in-jet and dihadron fragmentation
• Gluon TMD studies at EIC
• Color entanglement effect in collinear twist-3 factorization
• Generalized Universality for TMD Distribution Functions
• Measurement of the Transverse Single-Spin Asymmetry for Mid-rapidity Production of Neutral Pions in Polarized p+p Collisions at 200 GeV Center-of-Mass Energy
• Relations between generalized parton distributions and transverse momentum dependent parton distributions
• On the Relation Between Mechanisms for Single-Transverse-Spin Asymmetries
• Sivers effect in semi-inclusive DIS and in the Drell-Yan process
• Wilson Lines off the Light-cone in TMD PDFs
• Transverse-Momentum Distributions and Spherical Symmetry
• Instanton induced transverse single spin asymmetry for ${\pi }^0$ production in $pp$-scattering