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What do DVCS data tell us about TCS observables?

O. Grocholski, H. Moutarde, B. Pire, P. Sznajder, J. Wagner

SciPost Phys. Proc. 8, 070 (2022) · published 12 July 2022

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Deeply virtual Compton scattering (DVCS) and timelike Compton scattering (TCS) leading twist amplitudes are intimately related thanks to their analytic properties as a function of $Q^2$. We exploit this feature to use Compton form factors previously extracted from available DVCS data and derive data-driven predictions for TCS observables to be measured in near future experiments. Our results quantitatively illustrate the complementarity of DVCS and TCS experiments.

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