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RESEARCH PRODUCT
Breaking Symmetry Effects on Heavy Tetraquarks
Jean-marc RichardJavier VijandeA. Valcarcesubject
PhysicsThesaurus (information retrieval)010308 nuclear & particles physicsHigh Energy Physics::Phenomenologystabilitytetraquarkalgebra01 natural sciencescolorFew-body systemsTheoretical physicssymmetry breaking: effectalgebra: nonabelian[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]0103 physical sciencesTetraquarksHigh Energy Physics::Experimentmass ratiocolor: forceSymmetry (geometry)010306 general physicsdescription
In this contribution we present symmetry arguments that can be applied to study the stability of four-quark systems with two different masses. The role played by different symmetry breaking effects and the non-Abelian algebra of color forces is discussed in detail. In the particular case of hidden-flavor all-heavy four-quark states, QQ (Q) over bar(Q) over bar, the system becomes unstable for standard color-additive models. Differences and similarities between Qq (Q) over bar(q) over bar and QQ (q) over bar(q) over bar configurations are presented. In the latter case, its stability when the mass ratio M/m increases was established almost forty years ago. In the former case, we find a kind of metastability between the lowest threshold, (Q (Q) over bar - (q (q) over bar) and the highest one, (Q (q) over bar - ((Q) over barq).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-09-01 | International Journal of Modern Physics: Conference Series |