Left-Right Asymmetry in $\bar{p}p\to {\pi }^{-}{\pi }^{+}$

Abstract

Results for d$\sigma$/d$\Omega$ and $A_N$ in the reaction $\bar{p}p\to {\pi }^{-}{\pi }^{+}$ are predicted by a simple quark model. They are compared to recent experimental data from LEAR, as well as to previous predictions from nucleon-exchange models. At low energy the quark model does better than the nucleon-exchange models, but the overall comparison to experiment remains poor. In particular, the double-dip structure of the experimental $A_N$ data is only partly represented. This shortcoming of the simple quark model is traced back to a too small J=2 amplitude. This has interesting implications for the range of this specific annihilation process.

LATEX, 11 pages, 6 figures (available upon request), #RU9305

References in corpus (1)

• Generalized ${}^3{P}_0$ and ${}^3{S}_1$ Annihilation Potentials for $\bar{p}p$ Decay into Two Mesons based on a Simple Quark Model

Cited by in corpus (4)

• A relativistic treatment of pion wave functions in the annihilation antiproton-proton -> pi^-pi^+
• Annihilation range and final-state interaction in the antiproton-proton annihilation into pi-pi+
• An amplitude analysis of the $\overline{N}N\to {\pi }^{-}{\pi }^{+}$ reaction
• Relativistic effects and angular dependence in the reaction antiproton-proton -> pi^- pi^+