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Wide-angle photoproduction of the $\eta'$-meson and its gluon content
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abstract
We investigate wide-angle photoproduction of the $\eta'$ meson within the handbag approach to twist-3 accuracy. It turns out that, due to the gluon content of the $\eta'$, this process is dominated by twist-2 in contrast with pion and $\eta$ photoproduction. Using the presently available information on the twist-2 and twist-3 distribution amplitudes and on the $\eta - \eta'$ mixing, we provide prediction for the $\eta'$ cross section and helicity correlations. It is argued that $\eta'$ photoproduction is well suited to improve our knowledge of the two-gluon distribution amplitude.
Forward citations
Cited by 1 Pith paper
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Central exclusive production of $\eta$ and $\eta'$ mesons in diffractive proton-proton collisions at the LHC within the tensor-pomeron approach
The tensor-pomeron model predicts 0.3 to 0.7 microbarn cross sections for central eta-prime production at the LHC, and shows that scalar-pomeron models forbid eta, eta-prime, and f1 production entirely.
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