arXiv:hep-ph/0301102·v1·High Energy Physics — Phenomenology

Resummation Study on Decay $ρ \to π π$ in $U (2)_{L} \times U (2)_{R}$ Chiral Theory of Mesons

Yi-Bin Huang🇨🇳 · Mu-Lin Yan🇨🇳 · Xiao-Jun Wang🇨🇳

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 $ρ \to π π$ . A complete and compact expression for $f_{ρ π π} (p^{2})$ (up to $O (p^{\infty})$ ) is obtained, from which an important non-perturbative conclusion is given based on convergence and unitarity consideration.

Comments: 5 pages, 2 figures

Resummation Study on Decay ρ→ππ in U(2)L​×U(2)R​ Chiral Theory of Mesons

Abstract

Resummation Study on Decay $ρ \to π π$ in $U (2)_{L} \times U (2)_{R}$ Chiral Theory of Mesons