Analysis on the f 0 ( 600 ) and f 0 ( 980 ) Resonances in γγ → π + π − , π 0 π 0 Processes
نویسندگان
چکیده
We estimate the di-photon coupling of f0(600), f0(980) and f2(1270) resonances in a couple channel dispersive approach. Especially we estimate the di-photon coupling of the third sheet pole located near K̄K threshold, denoted as f III 0 (980). It is argued that this third sheet pole may be originated from a couple channel Breit-Wigner description of the f0(980) resonance. The f0(600) di-photon coupling is also reinvestigated using a single channel T matrix for ππ scattering with better analyticity property, and it is found to be significantly smaller than that of a q̄q state.
منابع مشابه
1 0 Ju n 20 09 A Dispersive Analysis on the f 0 ( 600 ) and f 0 ( 980 ) Resonances in γγ → π + π − , π 0 π 0 Processes
We estimate the di-photon coupling of f0(600), f0(980) and f2(1270) resonances in a coupled channel dispersive approach. The f0(600) diphoton coupling is also reinvestigated using a single channel T matrix for ππ scattering with better analyticity property, and it is found to be significantly smaller than that of a q̄q state. Especially we also estimate the di-photon coupling of the third sheet ...
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تاریخ انتشار 2009