Matches in SemOpenAlex for { <https://semopenalex.org/work/W3036903931> ?p ?o ?g. }
- W3036903931 abstract "We use a recently developed dispersive approach to compute the two-photon exchange (TPE) correction to elastic electron-proton scattering, including contributions from hadronic $J^P=1/2^pm$ and $3/2^pm$ resonant intermediate states below~1.8~GeV. For the transition amplitudes from the proton ground state to the resonant excited states we employ new exclusive meson electroproduction data from CLAS at $Q^2 lesssim 5$~GeV$^2$, and we explore the effects of both fixed and dynamic widths for the resonances. Among the resonant states, the $N(1520)~!3/2^-$ becomes dominant for $Q^2 gtrsim 2$~GeV$^2$, with a sign opposite to the comparably sized $Delta(1232)~!3/2^+$ contribution, leading to an overall increase in the size of the TPE correction to the cross section relative to the nucleon only contribution at higher $Q^2$ values. The results are in good overall agreement with recent $e^+ p$ to $e^- p$ cross section ratio and polarization transfer measurements, and provide compelling evidence for a resolution of the electric to magnetic form factor ratio discrepancy." @default.
- W3036903931 created "2020-06-25" @default.
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- W3036903931 date "2020-10-26" @default.
- W3036903931 modified "2023-10-01" @default.
- W3036903931 title "Two-photon exchange from intermediate state resonances in elastic electron-proton scattering" @default.
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- W3036903931 doi "https://doi.org/10.1103/physrevc.102.045205" @default.
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