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arXiv · hep-ph/9508356

$ρ\to 4π$ in chirally symmetric models

Robert S. Plant·Michael C. Birse
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Abstract

The decays $ρ^0\to 2π^+2π^-$ and $ρ^0\to 2π^0π^+π^-$ are studied using various effective Lagrangians for $π$ and $ρ$ (and in some cases $a_1$) mesons, all of which respect the approximate chiral symmetry of the strong interaction. Partial widths of the order of 1 keV or less are found in all cases. These are an order of magnitude smaller than recent predictions based on non-chiral models.

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Robert S. Plant, Michael C. Birse. 1995-08-23. $ρ\to 4π$ in chirally symmetric models. https://doi.org/10.1016/0370-2693(95)01273-7

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