Next-to-leading order QCD analysis of deeply virtual Compton scattering amplitudes

Freund, Andreas and McDermott, Martin (2002) Next-to-leading order QCD analysis of deeply virtual Compton scattering amplitudes. Physical Review D, 65 (7). 074008-. ISSN 0556-2821, 1089-4918

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Abstract

We present a next-to-leading order (NLO) QCD analysis of unpolarized and polarized deeply virtual Compton scattering (DVCS) amplitudes, for two different input scenarios, in the MS¯ scheme. We illustrate and discuss the size of the NLO effects and the behavior of the amplitudes in skewedness, ζ, and photon virtuality, Q2. In the unpolarized case, at fixed Q2, we find a remarkable effective power-law behavior in ζ, akin to Regge factorization, over several orders of magnitude in ζ. We also quantify the ratio of real to imaginary parts of the DVCS amplitudes and their sensitivity to changes of the factorization scale.

Item Type:	Article
Additional Information:	LTH 515. arXiv Number: arXiv:hep-ph/0106319v3. Additional citation information: PHYSICAL REVIEW D, VOLUME 65, 074008; 0556-2821/2002/65(7)/074008(12). 12 pages. Published 11 March 2002. Issue: April 2002.
Uncontrolled Keywords:	LIGHT-RAY OPERATORS, PARTON DISTRIBUTIONS, EVOLUTION-EQUATIONS, NONFORWARD DISTRIBUTIONS, NUCLEON, FACTORIZATION, KERNELS, PION, HERA
Subjects:	?? QC ??
Divisions:	Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	19 Nov 2009 12:44
Last Modified:	24 May 2025 04:21
DOI:	10.1103/physrevd.65.074008
Related Websites:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/570