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000620185 1001_ $$aBraun, V. M.$$b0
000620185 245__ $$aKinematic power corrections to DVCS to twist-six accuracy
000620185 260__ $$c2025
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000620185 500__ $$a9 pages + appendix, 6 beautiful figures
000620185 520__ $$aWe calculate $(\sqrt{-t}/Q)^k $ and $(m/Q)^k$ power corrections with $k\le 4$, where $m$ is the target mass and $t$ is the momentum transfer, to several key observables in Deeply Virtual Compton Scattering (DVCS). We find that the power expansion is well convergent up to $|t|/Q^2\lesssim 1/4$ for most of the observables, but is naturally organized in terms of $1/(Q^2+t)$ rather than the nominal hard scale $1/Q^2$. We also argue that target mass corrections remain under control and do not endanger QCD factorization for coherent DVCS on nuclei. These results remove an important source of uncertainties due to the frame dependence and violation of electromagnetic Ward identities in the QCD predictions for the DVCS amplitudes in the leading-twist approximation.
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000620185 7001_ $$0P:(DE-HGF)0$$aJi, Yao$$b1$$eCorresponding author
000620185 7001_ $$0P:(DE-H253)PIP1024579$$aManashov, A. N.$$b2
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000620185 9141_ $$y2025
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