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arXiv · 1706.00205

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

Ying Wang·Yury M. Bystritskiy·Azad I. Ahmadov·Egle Tomasi Gustafsson
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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 $π^0π^0$ 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 $ π^0η$, and $ηη$ production in the same energy range. A good agreement is generally obtained with all existing data.

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Ying Wang, Yury M. Bystritskiy, Azad I. Ahmadov, Egle Tomasi Gustafsson. 2017-06-01. Antiproton--proton annihilation into light neutral meson pairs within an effective meson theory. https://doi.org/10.1103/physrevc.96.025204

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