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Hard photoproduction of a diphoton with a large invariant mass
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Hard photoproduction of a diphoton with a large invariant mass
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The electromagnetic probe has proven to be a very efficient way to access the $3-$dimensional structure of the nucleon, particularly thanks to the exclusive Compton processes. We explore the hard photoproduction of a large invariant mass diphoton in the kinematical regime where the diphoton is nearly forward and its invariant mass is the hard scale enabling to factorize the scattering amplitude in terms of generalized parton distributions. This amplitude has a very peculiar and interesting analytic structure. We calculate unpolarized cross sections and the angular asymmetry triggered by a linearly polarized photon beam.
Forward citations
Cited by 8 Pith papers
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Exclusive photoproduction of a di-meson pair with large invariant mass
Calculations of di-meson photoproduction amplitudes at leading order show cross sections up to 100 times larger than single-meson cases, enabling better GPD extraction.
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Exclusive dijet electroproduction probes GPDs via new LO amplitudes for quark (with helicity and QED) and gluon channels, with HERA comparison and EIC projections.
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Exclusive photoproduction of a di-meson pair with large invariant mass
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