Antiproton--proton annihilation into light neutral meson pairs within an effective meson theory

Abstract

Antiproton--proton annihilation into light neutral mesons in the few GeV energy domain is investigated in view of a global description of the existing data and predictions for future experiments at PANDA, FAIR. An effective meson model earlier developed, with mesonic and baryonic degrees of freedom in $s$, $t$, and $u$ channels, is applied here to ${\pi }^0{\pi }^0$ production. Form factors with logarithmic $s$ and $t(u)$ dependencies are applied. A fair agreement with the existing angular distributions is obtained. Applying SU(3) symmetry, it is straightforward to recover the angular distributions for ${\pi }^0\eta$, and $\eta \eta$ production in the same energy range. A good agreement is generally obtained with all existing data.

20 pages, 9 Figures

References in corpus (3)

• Study of $e^{+}{e}^{-}\to p\bar{p}$ in the vicinity of $\psi (3770)$
• The fourth dimension of the nucleon structure: spacetime analysis of the timelike electromagnetic proton form factors
• Eta-nucleon coupling constant in QCD with SU(3) symmetry breaking

Cited by in corpus (1)

• The inclusive production of charged pion pairs in proton-antiproton collisions