2007/11/20 by A. V. Nefediev, Nefediev, A. V.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.0711.3076
LaTeX2e, 7 pages. Talk given at the 12th International Conference On Hadron Spectroscopy (Hadron 2007), Frascati, Italy, 8-13 October 2007, to appear in Proceedings
arxiv created 2007/11/20 · arxiv updated 2009/12/01
It is argued that radiative decays of scalars a0/f0(980) can serve as a decisive tool in establishing the nature of the latter. In particular, predictions for the widths of the radiative decays S->gamma V (S=a0/f0(980), V=omega/rho/gamma) are given in the framework of the molecule model of the scalars. Finite-range corrections are discussed in detail for the two-gamma decays of hadronic molecules, with a special attention payed to the interplay of various scales involved in the problem and to the gauge invariance of the amplitude. The results are applied to the two-photon decay of the f0(980), and the existing experimental data on this decay are argued to support the molecule assignment for the scalar f0(980).