| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1837940 | Nuclear Physics A | 2006 | 9 Pages |
Abstract
We present an evaluation of a two-photon exchange correction to the cross section for unpolarized Δ isobar production in electron–proton collisions, using a relativistic, crossing symmetric and gauge invariant approach. The calculated box and crossed-box diagrams include nucleon and Δ intermediate states. We find a relation between the angular nonlinearity of the two-photon exchange contribution and the value of the γΔΔ coupling constant.
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