QCD sum rule analysis of the pentaquark

Journal Article · Sun Jan 01 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.014010· OSTI ID:20774595

Lee, Hee-Jung ^[1]; Kochelev, N I ^[2]; Vento, V ^[1]

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1. Departament de Fisica Teorica and Institut de Fisica Corpuscular, Universitat de Valencia-CSIC, E-46100 Burjassot (Valencia) (Spain)
2. School of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-747 (Korea, Republic of)

We perform a QCD sum rule calculation to determine the mass and the parity of the lowest lying pentaquark state. We include operators up to dimension d=13 in the operator product expansion and the direct instanton contributions. We find evidence for a positive parity state. The contribution from operators of dimension d>5 is instrumental in determining the parity of the state and achieving the convergence of the sum rule.

• OSTI ID: 20774595
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 1; Other Information: DOI: 10.1103/PhysRevD.73.014010; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONVERGENCE
HYPERONS
OPERATOR PRODUCT EXPANSION
PARITY
PERIPHERAL MODELS
QUANTUM CHROMODYNAMICS
RESONANCE
REST MASS
SUM RULES