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arXiv · 0904.1648

Extraction of the Compton Form Factor H from DVCS measurements at Jefferson Lab

H. Moutarde
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Abstract

In the framework of Generalised Parton Distributions, we study the helicity-dependent and independent cross sections measured in Hall A and the beam spin asymmetries measured in Hall B at Jefferson Laboratory. We perform a global fit of these data and fits on each kinematical bin. We extract the real and imaginary parts of the Compton Form Factor $\mathcal{H}$ under the main hypothesis of dominance of the Generalised Parton Distribution $H$ and twist 2 accuracy. We discuss our results and compare to previous extractions as well as to the VGG model. We pay extra attention to the estimation of errors on the extraction of $\mathcal{H}$.

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H. Moutarde. 2009-04-10. Extraction of the Compton Form Factor H from DVCS measurements at Jefferson Lab. https://doi.org/10.1103/physrevd.79.094021

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