Understanding Pentaquark States in QCD

2003/07/31 by Shi-Lin Zhu · 16 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevlett.91.232002

published as Phys.Rev.Lett. 91 (2003) 232002

arxiv created 2003/10/25 · openalex publication_date 2003/12/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

We estimate the mass of the pentaquark state with QCD sum rules and find that pentaquark states with isospin I=0,1,2 lie close to each other around (1.55\ifmmode±\else\textpm\fi0.15) GeV. The experimentally observed baryon resonance \ensuremathΘ⁺(1540) with S=+1 can be consistently identified as a pentaquark state if its J^P=(1)/(2)^\ensuremath-. Such a state is expected in QCD. If its parity is positive, this pentaquark state is really exotic. The outstanding issue now is to determine its quantum numbers experimentally.

Cited by

• Study of pentaquarks on the lattice with overlap fermions
• DECAY PROBABILITY RATIO OF PENTAQUARK Θ+ STATE
• Θ++from the QCD sum rule
• Pentaquark state in pole-dominated QCD sum rules
• Pentaquark inK+‐dtotal cross section data
• θ+baryon in soliton models: LargeNcQCD and the validity of rigid-rotor quantization
• Pentaquark decay width in QCD sum rules
• Spin 3/2 pentaquarks
• Stability of the rotating SU(3) Skyrmion
• Search for higher flavor multiplets in partial-wave analyses
• Magnetic moment of the pentaquark Θ+(1540) with QCD sum rules
• Spin-3/2pentaquark in the QCD sum rule approach
• Pentaquark decay in QCD sum rules
• Pentaquarkϴ+production from the reactionγp→π+K−ϴ+
• Even parityΘpentaquark and stable antistrange nuclear matter
• Phenomenological Lagrangian approach to two kaon photoproduction and pentaquark searches

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• Pentaquark in a supersmmetric quark-diquark model
• Pentaquark from QCD sum rules: consequences of the diquark approach
• Pentaquark states from bound state approach with chiral partner structure
• Analysis of the hidden-charm pentaquark candidates in the J/ψΛ mass spectrum via the QCD sum rules
• Study on Pentaqaurks by Solving Schrodinger Equation in the Non-Hermitian Quantum Mechanics