The exclusive Drell-Yan process and deeply virtual pion production

Abstract

In this talk it is reported on analyses of l p -> l pi+ n and pi- p -> l+ l- n within the handbag approach. It is argued that recent measurements of hard pion production performed by HERMES and CLAS clearly indicate the occurrence of strong contributions from transversely polarized photons. The gamma*T -> pi transitions are described by the transversity GPDs accompanied by twist-3 pion wave functions. The experiments also require strong contributions from the pion pole which can be modeled as a classical one-pion exchange. With these extensions the handbag approach leads to results on cross sections and spin asymmetries in fair agreement with experiment. This approach is also used for an estimate of the partial cross sections for the exclusive Drell-Yan process.

8 pages, 6 figures, latex with style files jpsj-suppl.cls and cite.sty invited talk presented at MENU2016, Kyoto (Japan), July 2016. arXiv admin note: substantial text overlap with arXiv:1602.03803

References in corpus (10)

• Transverse spin structure of the nucleon from lattice QCD simulations
• Charged pion form factor between $Q^2$=0.60 and 2.45 GeV${}^2$. I. Measurements of the cross section for the ${}^1$H($e,e^{\prime }{\pi }^{+}$)$n$ reaction
• Deeply Virtual Meson Production on the nucleon
• Cross sections for hard exclusive electroproduction of pi+ mesons on a hydrogen target
• Accessing proton generalized parton distributions and pion distribution amplitudes with the exclusive pion-induced Drell-Yan process at J-PARC
• Exclusive ${\pi }^0$ electroproduction at $W>2$ GeV with CLAS
• The pion pole in hard exclusive vector-meson leptoproduction
• The exclusive limit of the pion-induced Drell-Yan process
• Rigorous pion electromagnetic form factor behavior in the space-like region
• Deeply Virtual Pseudoscalar Meson Production at Jefferson Lab and Transversity GPDs

Cited by in corpus (3)

• Determination of generalized parton distributions through a simultaneous analysis of axial form factor and wide-angle Compton scattering data
• Generalized Parton Distributions from charged current meson production
• GPDs from charged current meson production in $ep$ experiments