Role of Meson-Meson Correlation Effects in the $\NNb\toρπ$ Annihilation Process

Details Role of Meson-Meson Correlation Effects in the $\NNb\toρπ$ Annihilation Process Role of Meson-Meson Correlation Effects in the $\NNb\toρπ$ Annihilation Process

1994-12-06

arxiv.org/abs/nucl-th/9412007v1

Phys.Lett. B347 (1995) 193-197

Physics

Nuclear Physics

Nuclear Theory

REVTEX, 10 pages, 4 figures (uuencoded gzipped PostScript) included

Scientific paper

10.1016/0370-2693(95)00087-2

Meson-meson correlation effects are investigated in the $\NNb\to\rho\pi$ annihilation process using a realistic meson-exchange model for the $\rho\pi$ interaction determined previously, together with a conventional baryon-exchange transition model and a consistent $\NNb$ interaction. For $\NNb$ $S$-states, they have a drastic effect and bring the relative (${^1S_0}/{^3S_1}$) branching ratio up to the experimental value, thus resolving the long-standing so-called ``$\rho\pi$'' puzzle. For $\NNb$ $P$-states, their effect is of minor importance, and discrepancies remain for those ratios involving annihilation from the $\NNb({^3P_J})$ state to $\rho\pi(l'=2)$.

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