Mixing of scalar tetraquark and quarkonia states in a chiral approach

Details Mixing of scalar tetraquark and quarkonia states in a chiral approach Mixing of scalar tetraquark and quarkonia states in a chiral approach

2006-11-30

arxiv.org/abs/hep-ph/0611388v2

Phys.Rev.D75:054007,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 3 figures, 6 tables, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.75.054007

A chiral invariant Lagrangian describing the tetraquark-quarkonia interaction is considered at the leading and subleading order in the large-$N_{c}$ expansion. Spontaneous chiral symmetry breaking generates mixing of scalar tetraquark and quarkonia states and non-vanishing tetraquark condensates. In particular, the mixing strength is related to the decay strengths of tetraquark states into pseudoscalar mesons. The results show that scalar states below 1 GeV are mainly four-quark states and the scalars between 1 and 2 GeV quark-antiquark states, probably mixed with the scalar glueball in the isoscalar sector.

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