Single Transverse-Spin Asymmetries at Large-x

Abstract

The large-$x$ behavior of the transverse-momentum dependent quark distributions is analyzed in the factorization-inspired perturbative QCD framework, particularly for the naive time-reversal-odd quark Sivers function which is responsible for the single transverse-spin asymmetries in various semi-inclusive hard processes. By examining the dominant hard gluon exchange Feynman diagrams, and using the resulting power counting rule, we find that the Sivers function has power behavior $(1-x{)}^4$ at $x\to 1$, which is one power of $(1-x)$ suppressed relative to the unpolarized quark distribution. These power-counting results provide important guidelines for the parameterization of quark distributions and quark-gluon correlations.

20 pages, 4 figures

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Cited by in corpus (35)

• Relations between generalized and transverse momentum dependent parton distributions
• Transverse-momentum distributions in a diquark spectator model
• Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
• Measurement of the Collins and Sivers asymmetries on transversely polarised protons
• First Monte Carlo global QCD analysis of pion parton distributions
• The transverse momentum dependent distribution functions in the bag model
• Parton Distribution Functions from a Light Front Hamiltonian and QCD Evolution for Light Mesons
• Pion and kaon parton distribution functions from basis light front quantization and QCD evolution
• Constraining quark angular momentum through semi-inclusive measurements
• Azimuthal spin asymmetries in light-cone constituent quark models
• Twist-three Fragmentation Function Contribution to the Single Spin Asymmetry in pp Collisions
• Sivers and Boer-Mulders functions in Light-Cone Quark Models
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Pretzelosity distribution function h_1T^perp and the single spin asymmetry A_UT^sin(3phi-phi_S)
• Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions
• Are there approximate relations among transverse momentum dependent distribution functions?
• Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models
• Extracting Boer-Mulders functions from $p+D$ Drell-Yan processes
• Single Spin Asymmetry Scaling in the Forward Rapidity Region at RHIC
• Updating Boer-Mulders functions from unpolarized pd and pp Drell-Yan data
• Extraction of the distribution function $h_{1T}^{\perp }$ from experimental data
• Intrinsic Transverse Motion of the Pion's Valence Quarks
• Tomography of light mesons in light-cone quark model
• Sub-leading twist transverse momentum dependent parton distributions in the light-front quark-diquark model
• Twist-4 T-even proton TMDs in the light-front quark-diquark model
• Exploring twist-4 chiral-even GPDs in the light-front quark-diquark model
• Single Spin Asymmetry at Large x_F and k_T
• Threshold-Resummed Cross Section for the Drell-Yan Process in Pion-Nucleon Collisions at COMPASS
• Lorentz invariance relations and Wandzura-Wilczek approximation
• Twist-4 proton GTMDs in the light-front quark-diquark model
• Unraveling sub-leading twist GTMDs of proton using LFQDM
• Spin Orbit Correlations and the Structure of the Nucleon
• Pion-nucleus induced Drell-Yan cross section in models inspired by light-front holography
• Deciphering Twist-3 Chiral-Even GPDs in the Light-Front Quark-Diquark Model
• Recent developments in nucleon spin structure with focus on h_{1L}^{\perp} and pretzelosity h_{1T}^\perp