What do DVCS data tell us about TCS observables?

B. Pire; H.~Moutarde; J. Wagner; O.~Grocholski; P. Sznajder

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What do DVCS data tell us about TCS observables?

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arxiv 2106.11790 v1 pith:UV6YKII2 submitted 2021-06-22 hep-ph hep-exnucl-ex

O.~Grocholski , H.~Moutarde , B. Pire , P. Sznajder , J. Wagner This is my paper

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keywords dvcscomptondataexperimentsobservablesscatteringamplitudesanalytic

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abstract

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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