Spectroscopy of tetraquark mesons
Santopinto, Elena · Galatà, Giuseppe
Original · EN
A classification of tetraquark states in terms of the spin-flavour, colour and spatial degrees of freedom has been constructed. The permutational symmetry properties of both the spin-flavour and orbital parts of the quark-quark and antiquark-antiquark subsystems are briefly discussed. This classification is useful both for model-builders and experimentalists. An evaluation of the tetraquark spectrum is obtained from a Iachello mass formula for tetraquark systems. The ground state tetraquark nonet is identified with f₀(600), κ(800), f₀(980), a₀(980). The mass splittings predicted by this mass formula are in agreement with the KLOE, Fermilab E791 and BES experimental data.
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