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- W2749899412 abstract "We examine the two-photon exchange corrections to elastic electron-proton scattering within a dispersive approach, including contributions from both nucleon and $mathrm{ensuremath{Delta}}$ intermediate states. The dispersive analysis avoids off-shell uncertainties inherent in traditional approaches based on direct evaluation of loop diagrams and guarantees the correct unitary behavior in the high-energy limit. Using empirical information on the electromagnetic nucleon elastic and $Nmathrm{ensuremath{Delta}}$ transition form factors, we compute the two-photon exchange corrections both algebraically and numerically. Results are compared with recent measurements of ${e}^{+}p$ to ${e}^{ensuremath{-}}p$ cross section ratios from the CLAS, VEPP-3, and OLYMPUS experiments, as well as with polarization transfer observables." @default.
- W2749899412 created "2017-08-31" @default.
- W2749899412 creator A5023715674 @default.
- W2749899412 creator A5084803146 @default.
- W2749899412 date "2017-06-14" @default.
- W2749899412 modified "2023-09-25" @default.
- W2749899412 title "Dispersive approach to two-photon exchange in elastic electron-proton scattering" @default.
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- W2749899412 doi "https://doi.org/10.1103/physrevc.95.065209" @default.
- W2749899412 hasPublicationYear "2017" @default.
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