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Spectroscopy of tetraquark mesons

Elena Santopinto·Giuseppe Galatà
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Abstract

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 $f_{0}(600)$, $κ(800)$, $f_{0}(980)$, $a_{0}(980)$. The mass splittings predicted by this mass formula are in agreement with the KLOE, Fermilab E791 and BES experimental data.

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Elena Santopinto, Giuseppe Galatà. 2006-12-05. Spectroscopy of tetraquark mesons. https://arxiv.org/abs/hep-ph/0612044

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