The Singlet g_2 Structure Function in the Next-to-Leading Order

Abstract

Following a previous study of the one-loop factorization of the nonsinglet $g_2$ structure function of the nucleon, we present in this paper the next-to-leading order coefficient functions in the singlet sector. To obtain the result, the partonic processes of virtual Compton scattering off two and three "on-shell" gluons are calculated. A key step in achieving the correct factorization is to separate the correct twist-two contribution. The Burkardt-Cottingham sum rule is nominally satisfied at this order.

9 pages, 3 figures, RevTeX4, some minor corrections

References in corpus (5)

• Renormalization of twist-three operators and integrable lattice models
• Evolution equations for quark-gluon distributions in multi-color QCD and open spin chains
• Evolution of twist-three parton distributions in QCD beyond the large N_c limit
• One-Loop Factorization of the Nucleon g_2-Structure Function in the Non-Singlet Case
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Cited by in corpus (21)

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• Probing Quark-Gluon Interactions with Transverse Polarized Scattering
• Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Exact Relations for Twist-3 Gluon Distribution and Fragmentation Functions from Operator Identities
• Delta-to-N-gamma Coulomb Quadrupole Amplitude in PQCD
• Single Transverse Spin Asymmetries at Parton Level
• Generalized Parton Distributions and the Spin Structure of the Nucleon
• One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes
• One-Loop Corrections of Single Spin Asymmetries in Semi-Inclusive DIS
• Polarized Virtual Photon Structure Function $g_2^{\gamma }$ and Twist-3 Effects in QCD
• The QCD Coupling and Parton Distributions at High Precision
• On the contribution of twist-3 multi-gluon correlation functions to single transverse-spin asymmetry in SIDIS
• Transverse Single-Spin Asymmetries of Midrapidity Direct Photons, Neutral Pions, and Eta Mesons in 200 GeV Polarized Proton-Proton Collisions at PHENIX
• On the Relation Between Mechanisms for Single-Transverse-Spin Asymmetries
• Transverse momentum dependent quark distributions and polarized Drell-Yan processes