Positive Parity Scalar Mesons in the 1-2 GeV Mass Range

Based on the observation that K_0(1412) is lighter than its SU_3 counterpart, a_0(1474), we examine the possibility that these particles, together with f_0(1370), f_0(1507) and f_0(1714), fill a tetraquark recurrence of the light 0^{++} nonet mixed with a glueball state. We find the picture to be better consistent than the qqbar hypothesis with the known data about the three f_0 resonances. Conventional spin-orbit coupling suggests the qqbar, P-wave, nonet to lie around 1200 MeV