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000622768 1001_ $$0P:(DE-HGF)0$$aBraun, Vladimir M.$$b0$$eCorresponding author
000622768 245__ $$aThe two-loop coefficient functions for double deeply virtual Compton scattering
000622768 260__ $$aHeidelberg$$bSpringer$$c2025
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000622768 500__ $$a38 pages, 2 figures. arXiv admin note: text overlap with arXiv:2007.06348
000622768 520__ $$aMaking use of conformal symmetry of large-n$_{f}$ QCD in d = 4 – 2ϵ dimensions at the Wilson-Fischer fixed point, we calculate the two-loop coefficient functions in the operator product expansion of two electromagnetic currents in general kinematics with two different photon virtualities. This result is necessary for the description of the double deeply virtual Compton scattering to the next-to-next-to-leading order accuracy, but is also interesting for a range of other two-photon processes. We present analytic expression for the coefficient function in momentum fraction space in the $ \overline{\textrm{MS}} $ scheme and study its numerical impact on the Compton form factors for a simple model of the generalized parton distributions. The calculated corrections turn out to be large and are significant for the kinematics of proposed experiments.
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000622768 650_7 $$2autogen$$aFactorization
000622768 650_7 $$2autogen$$aRenormalization Group
000622768 650_7 $$2autogen$$aHigher-Order Perturbative Calculations
000622768 650_7 $$2autogen$$aScale and Conformal Symmetries
000622768 650_7 $$2autogen$$aSpecific QCD Phenomenology
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000622768 7001_ $$aJiang, Hua-Yu$$b1
000622768 7001_ $$0P:(DE-H253)PIP1024579$$aManashov, Alexander$$b2
000622768 7001_ $$avon Manteuffel, Andreas$$b3
000622768 773__ $$0PERI:(DE-600)2027350-2$$a10.1007/JHEP01(2025)069$$gVol. 01, no. 1, p. 69$$n1$$p069$$tJournal of high energy physics$$v01$$x1126-6708$$y2025
000622768 7870_ $$0PUBDB-2024-06709$$aBraun, Vladimir et.al.$$d2024$$iIsParent$$rDESY-24-178$$tThe two-loop coefficient function for double deeply virtual Compton scattering
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