Isoscalar amplitude dominance in $e^{+}e-$ annihilation to $N\bar{N}$ pair close to the threshold

Abstract

We use the Paris nucleon-antinucleon optical potential for explanation of experimental data in the process $e^{+}{e}^{-}\to p\bar{p}$ near threshold. It turns out that final-state interaction due to Paris optical potential allows us to reproduce available experimental data. It follows from our consideration that the isoscalar form factor is much larger than the isovector one.

7 pages, 3 figures

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• Probing the internal structure of baryons
• Real and virtual $N\bar{N}$ pair production near the threshold
• $N\bar{N}$ production in $e^{+}{e}^{-}$ annihilation near the threshold revisited
• Fine structure of the cross sections of $e^{+}{e}^{-}$ annihilation near the thresholds of $p\bar{p}$ and $n\bar{n}$ production
• Toy model to understand oscillatory behavior in timelike nucleon form factors
• Coulomb effects in the decays ${\rm Y}(4S)\to B\bar{B}$
• Final-state interaction in the process $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$
• Charge asymmetry in decays $B\to D\bar{D}K$
• Angular distributions in $J/\psi \to p\bar{p}{\pi }^0(\eta )$ decays
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$
• Near-threshold resonance in $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$ process
• Effects of isospin violation in the $e^{+}{e}^{-}\to B^{(\ast )}{\bar{B}}^{(\ast )}$ cross sections
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system