Quark content of f(0)(980)_from the decay ratios into pi pi, K(K)over-bar and gamma gamma

The quark content of the meson f(0)(980) is determined on the basis of coup ling constants of the decays f(0)(980) --> pi pi, K (K) over bar and gamma gamma. The combined analysis has been carried out with the Flatte formula f or the ratio of coupling constants g(K (K) over bar)g(pi pi) found by fitti ng to data for the decays f(0)(980) --> pi pi, K (K) over bar and transitio n form factor f(0)(980) --> q (q) over bar --> gamma gamma, which is determ ined from the data on gamma gamma partial width. For the flavour wave funct ion of f(0)(980) written as n (n) over bar cos phi + s (s) over bar sin phi , two solutions appear: 1) phi similar or equal to 55 degrees and 2) phi = -43 degrees. (C) 2000 Published by Elsevier Science B.V. All rights reserve d.