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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2022

Backward timelike Compton scattering to decipher the photon content of the nucleon

Résumé

The exclusive photoproduction off nucleon of a large invariant mass lepton pair in the backward region specified by the small Mandelstam variable -u is discussed in the framework of collinear QCD factorization. The amplitude is factorized in terms of photon-to-nucleon Transition Distribution Amplitudes (TDAs) which encode the photon content of the nucleon. Model estimates of these new non-perturbative objects are described and the corresponding cross sections calculated. The background due to the electromagnetic Bethe-Heitler process is shown to be negligible in the kinematical regime of interest.

Dates et versions

hal-03550374 , version 1 (01-02-2022)

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Citer

Bernard Pire, Kirill M. Semenov-Tian-Shansky, Alisa A. Shaikhutdinova, Lech Szymanowski. Backward timelike Compton scattering to decipher the photon content of the nucleon. European Physical Journal C: Particles and Fields, 2022, ⟨10.1140/epjc/s10052-022-10587-4⟩. ⟨hal-03550374⟩
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