2004/08/17 by Masayasu Harada, Harada, Masayasu
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0408189
RevTeX, 7 pages, 6 figures. Talk given at YITP workshop on "Multi-quark Hadrons; four, five and more ?", February 17-19, 2004, Yukawa Insitute, Kyoto, Japan. Some references are added
arxiv created 2004/09/10 · arxiv updated 2009/12/01
In this write-up, I summarize the analyses on the low-lying scalar mesons I have done recently with my collaborators. I first briefly review the previous analyses on the hadronic processes related to the scalar mesons, which shows that the scalar nonet takes dominantly the qqqq structure. Next, I summarize our analysis on the radiative decays involving the scalar mesons, which indicates that it is difficult to distinguish qqqq picture and qq picture just from radiative decays. Finally, I summarize our recent analysis on the π-π scattering in the large Nc QCD, which indicates that the σ meson is likely the qqqq state.