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Twophoton partial widths of tensor mesons  A.V. Anisovich
; V.V. Anisovich
; M.A. Matveev
; V.A. Nikonov
;  Date: 
29 Apr 2002  Journal:  Phys.Atom.Nucl. 66 (2003) 914927; Yad.Fiz. 66 (2003) 946959  Subject:  hepph  Abstract:  We calculate partial widths of the gammagamma decay of the tensor qar 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 qar 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) > gammagamma, a_0(980) > gammagamma and phi(1020) > gammaf_0(980): the assumption made is that of qar 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 Pwave qar q multiplet.  Source:  arXiv, hepph/0204330  Services:  Forum  Review  PDF  Favorites 


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