6533b829fe1ef96bd128a616
RESEARCH PRODUCT
Pentaquark and diquark–diquark clustering: a QCD sum rule approach
Markus Eidemüllersubject
PhysicsQuantum chromodynamicsParticle physicsQCD sum rulesNuclear and High Energy PhysicsHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesQuantum numberQCD sum rulesPentaquarkPentaquarkInterpretation (model theory)DiquarkNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentSum rule in quantum mechanicsNucleonNuclear Experimentdescription
In this work we study the Theta(1540) in the framework of QCD sum rules based on (ud)^2\bar{s} diquark clustering as suggested by Jaffe and Wilczek. Within errors, the mass of the pentaquark is compatible with the experimentally measured value. The mass difference between the Theta and the pentaquark with the quantum numbers of the nucleon amounts to 70 MeV, consistent with the interpretation of the N(1440) as a pentaquark.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-04-15 | Physics Letters B |