QCD Selection Rules in Polarized Hadron Collisions

Abstract

Plans are underway to measure spin asymmetries at large momentum transfer in hadron hadron collisions at RHIC and elsewhere. Proposals have focused on measuring quark transversity and quark and gluon helicity distributions in the nucleon. These experiments will also provide a strong and simple test of perturbative QCD, namely that ${\mathcal{A}}_{TT}/{\mathcal{A}}_{LL}\ll 1$ in $pp\to 2\mathrm{jets}+X$ and several related processes, whereas ${\mathcal{A}}_{TT}/{\mathcal{A}}_{LL}\sim 1$ in Drell-Yan production of muon pairs. The prediction tests the helicity, twist and chirality selection rules of perturbative QCD that form the foundation for the analysis of spin dependent hard processes. We estimate the ratio ${\mathcal{A}}_{TT}/{\mathcal{A}}_{LL}$ numerically for polarized protons at RHIC.

12 pages, 5 postscript figures, LaTex, tarred with epsf and additional style file

Cited by in corpus (29)

• Transverse Polarisation of Quarks in Hadrons
• Prospects for Spin Physics at RHIC
• Spin Physics and Polarized Structure Functions
• Next-to-leading Order Evolution of Transversity Distributions and Soffer's Inequality
• Single spin asymmetries in hadron-hadron collisions
• Transversity distributions in the nucleon in the large-N_c limit
• Polarized Structure Functions in QCD
• Correlations in double parton distributions: effects of evolution
• Two-loop anomalous dimensions for the structure function h1
• Soffer's inequality and the transversely polarized Drell-Yan process at next-to-leading order
• Dijet imbalance in hadronic collisions
• Dihadron interference fragmentation functions in proton-proton collisions
• On the QCD Evolution of the Transversity Distribution
• Double-Spin Transverse Asymmetries in Drell-Yan Processes
• Dilepton production near partonic threshold in transversely polarized proton-antiproton collisions
• Numerical solution of Q^2 evolution equation for the transversity distribution Delta_T q
• Structure functions in the polarized Drell-Yan processes with spin-1/2 and spin-1 hadrons: I. general formalism
• Accessing Transversity in Double-Spin Asymmetries at the BNL-RHIC
• Double transverse spin asymmetries in vector boson production
• Proton-deuteron asymmetry in Drell-Yan processes and polarized light-antiquark distributions
• Testing various polarized parton distributions at RHIC
• Next-to-leading order QCD corrections to A_TT for prompt photon production
• Next-to-leading order QCD corrections to single-inclusive hadron production in transversely polarized p-p and pbar-p collisions
• MC-Simulation of the Transverse Double Spin Asymmetry for RHIC
• Gluon polarization in transversely polarized nucleons and jet spin asymmetries at RHIC
• Chiral-Odd Structure Function h_1^D(x) and Tensor Charge of the Deuteron
• Single-inclusive hadron production in transversely polarized p-p and pbar-p collisions with threshold resummation
• Different behaviour of the spin structure functions $g_1(x)$ and $h_1(x)$ at $x\to 0$
• Transverse polarization distributions