A theory of scalar mesons
By G. Hooft, G. Isidori, L. Maiani, A. Polosa, V. Riquer. 2008
217 citations recorded by the source corpus.
Abstract We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquark–antidiquark picture. This addition allows for a remarkably good description of light scalar meson decays. The same effective Lagrangian produces a mixing of the lightest scalars with the positive parity q q ¯ states. Comparing with previous work where the q q ¯ mesons are identified with the nonet at 1200–1700 MeV, we find that the mixing required to fit the mass spectrum is in good agreement with the instanton coupling obtained from light scalar decays. A coherent picture of scalar mesons as a mixture of tetraquark states (dominating in the lightest mesons) and heavy q q ¯ states (dominating in the heavier mesons) emerges.
Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/5c92bff013eb29b786b6fe983441ce0bc763ea6c
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In Atomic and Molecular Physics, and Optics
In Nuclear and High Energy Physics
Citations in the corpus
- Exotics: Heavy pentaquarks and tetraquarks (2017, background): “ 115 168 90 +280 104 2:6 1:1 +2:3 1:8 2020 64 Candidates cos q D [deg] f -1 -0.5 0 0.5 1 0 100 200 300 q cos K* -100 0 100 1000 200300 fK*, f D -1 -0.5 0 0.5 1 0 100 200 300 cosq f being the lightest [297,298]. The dynamics of the light scalar mesons is in uenced by the infrared sector 0 -100 0 100 ”
- The Status of Glueballs (2013, background): “A picture of these scalar mesons as a mixture of tetra-quark states (dominating in the light mesons) and heavy (qq̄) states (dominating the heavier mesons) has been proposed in [60] based on an instanton induced effective Lagrangian theory.”