Spin-3/2 Pentaquark Resonance Signature
We search for the standard lattice resonance signature of attraction between the resonance constituents which leads to a bound state at quark masses near the physical regime. We study a variety of spin-1/2 interpolators and for the first time, interpolators providing access to spin-3/2 pentaquark states. In looking for evidence of binding, a precise determination of the mass splitting between the pentaquark state and its lowest-lying decay channel is performed by constructing the effective mass splitting from the various two-point correlation functions. While the binding of the pentaquark state is not a requirement, the observation of such binding would provide compelling evidence for the existence of the theta+ pentaquark resonance. Evidence of binding is observed in the isoscalar spin-3/2 positive parity channel, making it an interesting state for further research.
- Research Organization:
- TJNAF (Thomas Jefferson National Accelerator Facility, Newport News, VA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 850374
- Report Number(s):
- JLAB-THY-05-426; DOE/ER/40150-3601; TRN: US0504185
- Resource Relation:
- Conference: 23rd International Symposium On Lattice Field Field: Lattice 2005, 25-30 Jul 2005, Trinity College, Dublin, Ireland
- Country of Publication:
- United States
- Language:
- English
Similar Records
Lattice QCD studies of pentaquarks and exotics
Search for the pentaquark resonance signature in lattice QCD