6533b856fe1ef96bd12b3254
RESEARCH PRODUCT
Stable heavy pentaquarks in constituent models
Javier VijandeJean-marc RichardA. Valcarcesubject
QuarkNuclear and High Energy PhysicsParticle physicscolor: octetMesonHigh Energy Physics::LatticeNuclear TheoryHadronFOS: Physical sciencesConstituent quarkpentaquark: heavydissociation01 natural sciencesCharm quarkNuclear physicsHigh Energy Physics - Phenomenology (hep-ph)color: sextet0103 physical sciencesNuclear Experiment010306 general physicsPhysicsAnnihilation010308 nuclear & particles physicsHigh Energy Physics::Phenomenologyquark model: constituentchromoelectricstabilitylcsh:QC1-999PentaquarkBaryonHigh Energy Physics - Phenomenologychromomagnetic[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph][ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentlcsh:Physicsdescription
It is shown that standard constituent quark models produce $(\bar c c qqq)$ hidden-charm pentaquarks, where $c$ denotes the charmed quark and $q$ a light quark, which lie below the lowest threshold for spontaneous dissociation and thus are stable in the limit where the internal $\bar c c$ annihilation is neglected. The binding is a cooperative effect of the chromoelectric and chromomagnetic components of the interaction, and it disappears in the static limit with a pure chromoelectric potential. Their wave function contains color sextet and color octet configurations for the subsystems and can hardly be reduced to a molecular state made of two interacting hadrons. These pentaquark states could be searched for in the experiments having discovered or confirmed the hidden-charm meson and baryon resonances.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-10-20 | Physics Letters B |