Isospin Symmetry Breaking in ρ→πγDecay

2001/01/31 by Xiao-Jun Wang, Ji-Hao Jiang, Mu-Lin Yan
Physics and Astronomy · #hep-ph

paper · pdf

published as Eur.Phys.J. A14 (2002) 219-224 · 8 page, revtex, 3 figures, to appear EPJA

arxiv created 2002/04/05 · arxiv updated 2009/11/30

Abstract

In terms of effective field theory and mixed propagator approach, we show that there is a larger hidden effect of isospin breaking in ρ⁰→π⁰γ decay due to an ω exchange, ρ⁰→ω→π⁰γ. The branching ratio is predicted as B(ρ⁰→π⁰γ)=(11.67± 2.0)× 10^-4, which is much larger than Partcile Data Group's datum (6.8± 1.7)× 10^-4 and one of charged mode, B(ρ^±→π^±γ)=(4.5± 0.5)× 10^-4.

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