NLO corrections to the twist-3 amplitude in DVCS on a nucleon in the Wandzura-Wilczek approximation: quark case

Abstract

We computed the NLO corrections to twist-3, $L\to T$, flavor non-singlet amplitude in DVCS on a nucleon in the Wandzura-Wilczek approximation. Explicit calculation shows that factorization holds for NLO contribution to this amplitude, although the structure of the factorized amplitude at the NLO is more complicated than in the leading-order formula. Next-to-leading order coefficient functions for matrix elements of twist-3 vector and axial-vector quark string operators and their LO evolution equations are presented.

15 pages, 4 figures

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Cited by in corpus (7)

• Unraveling hadron structure with generalized parton distributions
• Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections
• Refined analysis of photon leptoproduction off spinless target
• Generalized Parton Distributions: visions, basics, and realities
• Twist-3 GPDs in Deeply-Virtual Compton Scattering
• Singularities in Twist-3 Quark Distributions
• Generalized Parton Distributions -- theoretical review --