6533b85bfe1ef96bd12ba183
RESEARCH PRODUCT
Unraveling the pattern of the XYZ mesons
A. ValcarceJavier Vijandesubject
Particle physicsNuclear and High Energy PhysicsMesonNuclear TheoryHigh Energy Physics::LatticeNuclear TheoryFOS: Physical sciencesQuantum entanglementSpectral lineNuclear physicsNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)Bound stateB mesonNuclear ExperimentPhysicsQuark modelEta mesonHigh Energy Physics::PhenomenologyFísicalcsh:QC1-999J/psi mesonHigh Energy Physics - PhenomenologyHigh Energy Physics::Experimentlcsh:Physicsdescription
We present a plausible mechanism for the origin of the $XYZ$ mesons in the heavy meson spectra within a standard quark-model picture. We discuss the conditions required for the existence of four--quark bound states or resonances contributing to the heavy meson spectra, being either compact or molecular. We concentrate on charmonium and bottomonium spectra, where several new states, difficult to understand as simple quark-antiquark pairs, have been reported by different experimental collaborations. The pivotal role played by entangled meson-meson thresholds is emphasized.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-09-01 |