Two-photon partial widths of tensor mesons

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.

37 pages, 7 figures, epsfig

References in corpus (4)

• Systematics of q anti-q states in the (n,M^2) and (J,M^2) planes
• The Meson Spectrum in a Covariant Quark Model
• First observation of the $\varphi \to {\pi }^{+}{\pi }^{-}\gamma$ decay
• Partial widths a_0(980)\toγγ, f_0(980)\toγγand q\bar q-classification of the lightest scalar mesons

Cited by in corpus (7)

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• Study of the $f_2(1270)$, $f_2^{\prime }(1525)$, $f_0(1370)$ and $f_0(1710)$ in the $J/\psi$ radiative decays
• Two-photon and one photon-one vector meson decay widths of the $f_0(1370)$, $f_2(1270)$, $f_0(1710)$, $f_2^{\prime }(1525)$, and $K_2^{\ast }(1430)$
• Estimates for X(4350) Decays from the Effective Lagrangian Approach
• Radiative decays of quarkonium states, momentum operator expansion and nilpotent operators
• Tests on the molecular structure of $f_2(1270)$, $f_2^{\prime }(1525)$ from $\psi (nS)$ and ${\rm Y}(nS)$ decays
• Decay of vector-vector resonances into $\gamma$ and a pseudoscalar meson