Theory of time-like baryon form factors near thresholds

Abstract

A new mechanism of baryon-antibaryon production via nonperturbative double pair creation in intermediate mesons is proposed and the theory contains no fitting parameters. It is shown, that near-threshold resonances are responsible for enhancements in electroproduction cross sections: $\psi (4S)$ for ${\Lambda }_c^{+}{\Lambda }_c^{-},{\rm Y}(6S)$ for ${\Lambda }_b{\bar{\Lambda }}_b$. An admixture of intermediate $D$- wave resonances produces angular dependence in differential cross section and can explain unusual behavior of the ratio $G_E/G_M$ for the proton.

5 pages,4 figures

References in corpus (7)

• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Hadron Production via e+e- Collisions with Initial State Radiation
• The $\mathbf{S}-\mathbf{D}$ mixing and di-electron widths of higher charmonium $1^{--}$ states
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
• Relativistic theory of string breaking in QCD
• Rescattering Effect and Near Threshold Enhancement of $p\bar{p}$ System
• Theory of hadron decay into baryon-antibaryon final state

Cited by in corpus (2)

• The electromagnetic form factors of the proton in the timelike region
• Boosting QED and QCD bound states in the path integral formalism