Single Transverse-Spin Asymmetry in Hadronic Dijet Production

Abstract

We study the single transverse-spin asymmetry for dijet production in hadronic collisions in both the collinear QCD factorization approach and the Brodsky-Hwang-Schmidt model. We show that a nonvanishing asymmetry is generated by both initial-state and final-state interactions, and that the final-state interactions dominate. We find that in the leading kinematic region where the transverse momentum imbalance of the two jets, q_\perp = P_{1\perp}+P_{2\perp}, is much less than the momentum of either jet, the contribution from the lowest non-trivial perturbative order to both the spin-averaged and the spin-dependent dijet cross sections can be factorized into a hard part that is a function only of the averaged jet momentum P_\perp = (P_{1\perp}-P_{2\perp})/2, and perturbatively generated transverse momentum dependent (TMD) parton distributions. We show that the spin asymmetry at this non-trivial perturbative order can be described by the TMD parton distributions defined in either semi-inclusive DIS or the Drell-Yan process. We derive the same hard parts from both the collinear factorization approach and in the context of the Brodsky-Hwang-Schmidt model, verifying that they are not sensitive to details of the factorized long distance physics.

60 pages, 22 figures

References in corpus (5)

• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Universal Structure of Twist-3 Soft-Gluon-Pole Cross Sections for Single Transverse-Spin Asymmetry
• Single-Transverse Spin Asymmetry in Dijet Correlations at Hadron Colliders
• Asymmetric Di-jet Production in Polarized Hadronic Collisions
• Single hadron transverse spin asymmetries from COMPASS

Cited by in corpus (9)

• Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
• Single transverse-spin asymmetry for $D$-meson production in semi-inclusive deep inelastic scattering
• Hadronic Dijet Imbalance and Transverse-Momentum Dependent Parton Distributions
• Collins Asymmetry at Hadron Colliders
• 2-soft-gluon exchange and factorization breaking
• Coordinate-space picture and $x\to 1$ singularities at fixed $k_{\perp }$
• Azimuthal angle dependence of di-jet production in unpolarized hadron scattering
• On the Relation Between Mechanisms for Single-Transverse-Spin Asymmetries
• The Role of Gauge Invariance in Single-Spin Asymmetries