Investigations on the Property of $f_0(600)$ and $f_0(980)$ Resonances in $γγ\to ππ$ Process

Details Investigations on the Property of $f_0(600)$ and $f_0(980)$ Resonances in $γγ\to ππ$ Process Investigations on the Property of $f_0(600)$ and $f_0(980)$ Resonances in $γγ\to ππ$ Process

2009-10-02

arxiv.org/abs/0910.0341v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given by H. Q. Zheng at 6th International Workshop on Chiral Dynamics, CD09, July 6-10, 2009, Bern, Switzerland

Scientific paper

Using dispersion relation technique and experimental data, a coupled channel analysis on $\gamma\gamma\to\pi\pi$ process is made. Di-photon coupling of $f_0(600)$ and $f_0(980)$ resonances are extracted and their dynamical properties are discussed. Especially we study the physical meaning of the coupling constant $g^2_{\sigma\pi\pi}$, which maintains a negative real part as determined through dispersive analyses.

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