$\Delta$ contribution in $e^{+}+e^{-}\to p+\bar{p}$ at small $s$

Abstract

Two-photon annihilate contributions in the process $e^{+}+e^{-}\to p+\bar{p}$ including $N$ and $\Delta$ intermediate are discussed in a simple hadronic model. The corrections to the unpolarized cross section and polarized observables $P_x,P_z$ are presented. The results show the two-photon annihilate correction to unpolarized cross section is small and its angle dependence becomes weak at small $s$ after considering the $N$ and $\Delta (1232)$ contributions simultaneously, while the correction to $P_z$ is enhanced.

5 pages

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Cited by in corpus (1)

• Resonances contribution to two-photon exchange effects and possible large forward-backward asymmetry in $e^{+}{e}^{-}\to p\bar{p}$