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Scalar mesons: fifty years of challenging the quark model
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abstract
Half a century of work on the light scalar mesons $f_0(500)$, $f_0(980)$, $K_0^\star(700)$, and $a_0(980)$ is briefly reviewed. After summarising all light scalar candidates in the Review of Particle Physics since 1963, a selection of different theoretical and phenomenological descriptions is presented, including pure meson-meson models, a tetraquark construction, unitarised quark-meson models, unitarised effective chiral approaches, and a very recent lattice-QCD simulation.
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Cited by 1 Pith paper
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Investigating the role of tetraquark operators in lattice QCD studies of the $a_0(980)$ and $\kappa$ resonances
Including at least one tetraquark operator in lattice QCD correlator matrices reveals a previously missed finite-volume energy level in the Kη subsystem and drastically changes the extracted a0(980) channel spectrum.
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