Two-Photon Exchange Contribution to Proton Form Factors in Time-Like region

Abstract

We estimate two-photon exchange contribution to the process $e^{+}+e^{-}\to p+\bar{p}$. The two-photon exchange corrections to double spin polarization observables and form factors in the time-like region are calculated. The corrections are found to be small in magnitude, but with a strong angular dependence at fixed momentum transfer. These two features are the same as those in the space-like region. In the view of experiment, the double spin polarization observable $P_z$ deserves to be considered.

arXiv comment10 pages, 6 figures

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Cited by in corpus (11)

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• Nucleon Electromagnetic Form Factors in the Timelike Region
• Transport properties and the anisotropy of Ba_{1-x}K_xFe_2As_2 single crystals in normal and superconducting states
• Reconciling the X(2240) with the Y(2175)
• Estiamte of the two-photon exchange effect on deuteron electromagnetic form factors
• Form factor ratio from unpolarized elastic electron proton scattering
• Two-photon exchange: myth and history
• Two-photon exchange effects in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ and time-like pion electromagnetic form factor
• Resonances contribution to two-photon exchange effects and possible large forward-backward asymmetry in $e^{+}{e}^{-}\to p\bar{p}$
• Two-Photon-Exchange effects in $ep\to en{\pi }^{+}$ and their corrections to separated cross sections ${\sigma }_{\text{L,T,LT,TT}}$ at small $-t$
• $\Delta$ contribution in $e^{+}+e^{-}\to p+\bar{p}$ at small $s$