Two-photon partial widths of tensor mesons

AbstractPartial widths of the γγ decay of the tensor q $$\bar q$$ states a2(1320), f2(1270), and f2(1525) and their radial excitations a2(1660), f2(1640), and f2(1800), as well as 3F2q $$\bar q$$ states, are calculated. Calculations are performed in the framework of the same approach that was used before for the study of radiative decays f0(980) → γγ, a0(980) → γγ, and φ(1020) → γf0(980): the assumption made is that of q $$\bar q$$ structure of f0(980) and a0(980) [A.V. Anisovich et al., Phys.Lett. B 456, 80 (1999); Yad. Fiz. 65, 523 (2002)].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 favor of the fact that these scalar and tensor mesons are to be classified as members of the same P-wave q $$\bar q$$ multiplet.