Two or Four: A Hint from Scalar Mesons in Radiative phi Decays ?

Details Two or Four: A Hint from Scalar Mesons in Radiative phi Decays ? Two or Four: A Hint from Scalar Mesons in Radiative phi Decays ?

2007-05-06

arxiv.org/abs/0705.0802v1

Prog.Theor.Phys.Suppl.168:173-177,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given by M. Harada at Yukawa International Seminar (YKIS) 2006 ``New Frontiers in QCD -Exotic Hadrons and Hadronic Matter

Scientific paper

10.1143/PTPS.168.173

In this write-up, we summarize our recent analysis of radiative decays involving light scalar mesons. Our analysis using the vector meson dominance model at tree level indicates that it may be difficult to distinguish $qq\bar{q}\bar{q}$ picture and $q\bar{q}$ picture for the light scalar nonet. Our result on the process of $\phi \to \pi^0 \eta \gamma$ shows that the derivative-type $f_0 K\bar{K}$ interaction reproduces experimental data below 950 GeV well, but gives a poor fit above 950 GeV, i.e., in the energy region around the mass of $a_0(980)$, but that the discrepancy can be compensated by the effect of the $K$ loop.

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