Two-photon partial widths of tensor mesons
Abstract
We calculate partial widths of the gamma-gamma decay of the tensor q q states a2(1320), f2(1270), f2(1525), their radial excitations a2(1660), f2(1640), f2(1800) as well as 3F2 q q states. Calculations are performed in the framework of the same approach which was used before for the study of radiative decays f0(980) -> gamma-gamma, a0(980) -> gamma-gamma and phi(1020) -> gamma-f0(980): the assumption made is that of q q structure of f0(980) and a0(980) [A.V. Anisovich et al., Phys. Lett. B 456, 80 (1999); Eur. Phys. J. A 12, 103 (2001)]. The description of the decay partial widths for a2(1320), f2(1270), f2(1525) and f0(980), a0(980) is reached with the approximately equal radial wave functions, thus giving a strong argument in favour of the fact that these scalar and tensor mesons are to be classified as members of the same P-wave q q multiplet.
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