Radiative decays of mesons in the quark model: relativistic and non-relativistic approaches

Anisovich, A. V.; Anisovich, V. V.; Nikonov, V. A.

Radiative decays of mesons in the quark model: relativistic and non-relativistic approaches

Authors

Anisovich, A. V.

Anisovich, V. V.

Nikonov, V. A.

Description

Different conclusions about quark nature of f0(980) based on the analysis of data on the reaction phi(1020) -> gamma f0(980) make it necessary to perform detailed comparison of formulae used by various groups for the calculation of partial widths of radiative decays. We carry out a comparative analysis of methods of calculation of radiative decays like phi -> gamma f0 and phi -> gamma eta performed by F.E.Close et al., Phys. Rev. D 65, 092003 (2002), and A.V.Anisovich et al., Eur. Phys. J. A 12, 103 (2001); Yad. Fiz. 65, 523 (2002).
11 pages, Latex, 1 figure, We have extended the discussion of analytical properties of the amplitude