Real and virtual $N\bar{N}$ pair production near the threshold

Abstract

Nucleon-antinucleon optical potential, which explains the experimental data for the processes $e^{+}{e}^{-}\to p\bar{p}$ and $e^{+}e^{-}\rightarrow\mbox{pions}$ near the threshold of $p\bar{p}$ pair production, is suggested. To obtain this potential we have used the available experimental data for $p\bar{p}$ scattering, $p\bar{p}$ pair production in $e^{+}{e}^{-}$ annihilation, and the ratio of electromagnetic form factors of a proton in the timelike region. It turns out that final-state interaction via the optical potential allows one to reproduce the available experimental data with good accuracy. Our results for the cross sections of $e^{+}{e}^{-}\to 6\pi$ process near the threshold of $p\bar{p}$ pair production are in agreement with the recent experiments.

13 pages, 5 figures

References in corpus (7)

• The electromagnetic form factors of the proton in the timelike region
• Study of the process $e^{+}{e}^{-}\to n\bar{n}$ at the VEPP-2000 $e^{+}{e}^{-}$ collider with the SND detector
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector
• Energy-dependent partial-wave analysis of all antiproton-proton scattering data below 925 MeV/c
• Origin of the structures observed in $e^{+}{e}^{-}$ annihilation into multipion states around the $\bar{p}p$ threshold
• Spin effects in $p\bar{p}$ interaction and their possible use to polarize antiproton beams
• Forward antiproton-deuteron elastic scattering and total spin-dependent antiproton-deuteron cross sections at intermediate energies

Cited by in corpus (18)

• Antinucleon-nucleon interaction at next-to-next-to-next-to-leading order in chiral effective field theory
• The electromagnetic form factors of the $\Lambda$ in the timelike region
• Observation of a Fine Structure in $e^{+}{e}^{-}\to$ hadrons Production at the Nucleon-antinucleon 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
• Interaction of real and virtual $p\bar{p}$ pairs in $J/\psi \to p\bar{p}\gamma (\rho ,\omega )$ decays
• Coulomb effects in the decays ${\rm Y}(4S)\to B\bar{B}$
• $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ and the structure observed around the $\bar{p}p$ threshold
• 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
• Near-threshold resonance in $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$ process
• Coupled channels and production of near-threshold $B^{(\ast )}{\bar{B}}^{(\ast )}$ resonances in $e^{+}{e}^{-}$ annihilation
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$
• Effects of isospin violation in the $e^{+}{e}^{-}\to B^{(\ast )}{\bar{B}}^{(\ast )}$ cross sections
• Common explanation of the behavior of some $e^{+}{e}^{-}$ annihilation processes around $\sqrt{s}$ = 1.9 GeV
• Meson production in $J/\psi$ decays and $J/\psi \to N\bar{N}\gamma$ process
• Coupled-channel analysis of the near-threshold $e^{+}{e}^{-}\to N\bar{N}$ cross sections