Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-05-13
Phys.Rev. D68 (2003) 014016
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 2 figures, detailed comparison with DVCS included
Scientific paper
10.1103/PhysRevD.68.014016
We calculate the one-loop QCD virtual corrections to all helicity amplitudes for parton level virtual Compton scattering processes. We include the amplitudes both on quark target process $\gamma^* q\to\gamma q$ and on gluon target process $\gamma^*g\to\gamma g$. The infrared pole structure of the amplitudes is in agreement with the prediction of Catani's general formalism for the singularities of one-loop amplitudes, while expressions for the finite remainder are given in terms of logarithms and dilogarithms that are real in the physical region.
Huang Han-Wen
Morii Toshiyuki
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