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Resummation Study on Decay $ρ\toππ$ in $U(2)_L\times U(2)_R$ Chiral Theory of Mesons

Yi-Bin Huang·Mu-Lin Yan·Xiao-Jun Wang
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Abstract

We improve $O(p^4)$ calculation in $U(2)_L\times U(2)_R$ chiral theory of mesons by resummation calculation for vector mesons physics and restudy decay $ρ\toππ$. A complete and compact expression for $f_{ρππ}(p^2)$ (up to $O(p^\infty)$) is obtained, from which an important non-perturbative conclusion is given based on convergence and unitarity consideration.

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Yi-Bin Huang, Mu-Lin Yan, Xiao-Jun Wang. 2003-01-15. Resummation Study on Decay $ρ\toππ$ in $U(2)_L\times U(2)_R$ Chiral Theory of Mesons. https://arxiv.org/abs/hep-ph/0301102

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