Positive Parity Scalar Mesons in the 1-2 GeV Mass Range
نویسندگان
چکیده
Based on the observation that K0(1430) is lighter than its SU3 counterpart, a0(1450), we examine the possibility that these particles, together with f0(1370), f0(1500) and f0(1710), fill a tetraquark recurrence of the sub-GeV 0 nonet mixed with a glueball state. We find the picture to be consistent with the known data about the three f0 resonances, more than the qq̄ hypothesis. Conventional spinorbit coupling suggests the qq̄, P-wave, nonet to lie around 1200 MeV. We review possible experimental indications of a scalar isovector resonance at 1.29 GeV, first observed by OBELIX in pp̄ annihilation. PACS: 12.39.Mk, 12.40.-y, 13.25.Jx ROME1-1429-rev/2006.
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