A study of the gamma* - f0(980) transition form factors

Abstract: The spin wave function of the f0(980)-meson is constructed under the assumption that the meson is dominantly a quark-antiquark state. This wave function is used in a calculation of the gamma* - f0 transition form factors. In the real-photon limit the results for the transverse form factor are compared to the large momentum transfer data measured by the BELLE collaboration recently. It turns out that, for the momentum-transfer range explored by BELLE, the collinear approximation does not suffer, power corrections to it, modeled as quark transverse moment effects, seem to be needed. Mixing of the f0 with the sigma(500) is also briefly discussed.