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A Theory of Scalar Mesons by G. 't Hooft; G. Isidori; L. Maiani; A.D. Polosa; V. Riquer is a Physics and Astronomy article available to read on EtoBox.

What is A Theory of Scalar Mesons about?

We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquarkantidiquark 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.

Who reads A Theory of Scalar Mesons?

Author

G. 't Hooft; G. Isidori; L. Maiani; A.D. Polosa; V. Riquer

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0370-2693)

Published

2008

Language

EN

Field

Physics and Astronomy (Physical Sciences)