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2021-12-02 - Colloque/Présentation - communication orale - Anglais - page(s)

Willemyns Cintia , Goity Jose, Weiss Christian, "A large Nc approach to the study of spin effects in low-energy electron-nucleon scattering with two-photon exchange" in BPS Conference 2021, Hasselt, Belgique, 2021

  • Codes CREF : Physique (DI1200)
  • Unités de recherche UMONS : Physique nucléaire et subnucléaire (S824)
Texte intégral :

Abstract(s) :

(Anglais) The transverse single-spin asymmetry in inclusive electron-nucleon scattering, e + N(ST) → e' + X, represents a pure two-photon exchange observable and is of fundamental interest for exploring higher-order QED effects in electron scattering. We compute this observable in the resonance region, where excitation of ∆ isobars occurs in both intermediate and final states. We employ a novel theoretical method based on the large-Nc limit of QCD. Our predictions could be tested in future measurements of electron-nucleon scattering with polarized targets.


Mots-clés :
  • (Anglais) Two-photon exchange
  • (Anglais) single-spin asymmetry
  • (Anglais) 1/Nc expansion