Email RIS file
Bookmark
Report an Issue

Two-photon-exchange effects in the electro-excitation of the $\Delta$ resonance [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
We evaluate the two-photon exchange contribution to the eN → eΔ(1232) → eπN process at large momentum transfer with the aim of a precision study of the ratios of electric quadrupole (E2) and Coulomb quadrupole (C2) to the magnetic dipole (M1) γ* NΔ transitions. We relate the two-photon exchange amplitude to the N → Δ generalized parton distributions and obtain a quantitative estimate of the two-photon effects. The two-photon exchange corrections to the C2/M1 ratio depend strongly on whether this quantity is obtained from an interference cross section or from the Rosenbluth-type cross sections, in similarity with the elastic, eN → eN, process.
Report Numbers
E 1.99:jlab-thy-05-402
E 1.99: doe/er/40150-3573
doe/er/40150-3573
jlab-thy-05-402
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
09/15/2005.
"jlab-thy-05-402"
" doe/er/40150-3573"
FT
Carl E. Carlson; Vladimir Pascalutsa; Marc Vanderhaghen.
Funding Information
AC05-84ER40150
View MARC record | catkey: 14708908