6533b836fe1ef96bd12a135e
RESEARCH PRODUCT
Triquark correlations and pentaquarks in a QCD sum rule approach
Hee-jung LeeNikolai KochelevVicente Ventosubject
QuarkParticle physicsNuclear and High Energy PhysicsNuclear TheoryHigh Energy Physics::LatticeHadronNuclear TheoryQuarksFOS: Physical sciencesHadronsHigh Energy Physics - ExperimentNuclear Theory (nucl-th)High Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)InstantonOperator product expansionQuantum chromodynamicsPhysicsHigh Energy Physics::PhenomenologyFísicaPentaquarkPentaquarkDiquarkHigh Energy Physics - PhenomenologyExotic baryonHigh Energy Physics::ExperimentSum rule in quantum mechanicsdescription
The role of quark correlations in the description of hadron dynamics in many domains of physics, from low energy dynamics to very hot(dense) systems, is being appreciated. Strong correlations of two quarks (diquark) have been widely investigated in this respect. Recently, we have proposed a dynamical scheme to describe the $\Theta^+$ pentaquark in which also three quark correlations (triquark) were instrumental in producing a low mass exotic state. We perform a study, within the QCD sum rule approach including OPE and direct instanton contributions, of triquark correlations and obtain two quasi-bound light $ud\bar{s}$ color quark clusters of 800 MeV and 930 MeV respectively.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-03-01 |