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What can be learned from the transition form factor of $$\gamma ^*\gamma ^*\rightarrow \eta '$$ γ ∗ γ ∗ → η ′ : feasibility study

URN to cite this document:
urn:nbn:de:bvb:355-epub-455103
Ji, Yao ; Vladimirov, Alexey
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Date of publication of this fulltext: 06 Apr 2021 14:09


Abstract

We present an analysis of the recent measurement of η′-meson production by two virtual photons made by the BaBar collaboration. It is the first measurement of a transition form factor which is entirely within the kinematic regime of the collinear factorization approach, and it thus provides a clean test of the QCD factorization theorem for distribution amplitudes (DAs). We demonstrate that the ...

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