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arXiv · hep-ph/0204330

Two-photon partial widths of tensor mesons

A. V. Anisovich·V. V. Anisovich·M. A. Matveev·V. A. Nikonov
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Abstract

We calculate partial widths of the gamma-gamma decay of the tensor q\bar q states a_2(1320), f_2(1270), f_2(1525), their radial excitations a_2(1660), f_2(1640), f_2(1800) as well as ^3F_2 q\bar q states. Calculations are performed in the framework of the same approach which was used before for the study of radiative decays f_0(980) -> gamma-gamma, a_0(980) -> gamma-gamma and phi(1020) -> gamma-f_0(980): the assumption made is that of q\bar q structure of f_0(980) and a_0(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 a_2(1320), f_2(1270), f_2(1525) and f_0(980), a_0(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\bar q multiplet.

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A. V. Anisovich, V. V. Anisovich, M. A. Matveev, V. A. Nikonov. 2002-04-29. Two-photon partial widths of tensor mesons. https://doi.org/10.1134/1.1577914

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