Study of pentaquarks on the lattice with overlap fermions

Journal Article · Fri Oct 01 00:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.074508· OSTI ID:20705365

Mathur, N; Alexandru, A; Dong, S J; Draper, T; Horvath, I; Liu, K F; Tamhankar, S ^[1]; Lee, F X ^[2]; Bennhold, C ^[2]; Chen, Y ^[3]; Zhang, J B ^[4]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)
2. Center for Nuclear Studies, Department of Physics, George Washington University, Washington, D.C. 20052 (United States)
3. Institute of High Energy Physics, Academia Sinica, Beijing 100039 (China)
4. CSSM and Department of Physics, University of Adelaide, SA 5005 (Australia)

We present a quenched lattice QCD calculation of spin-1/2 five-quark states with uudds quark content for both positive and negative parities. We do not observe any bound pentaquark state in these channels for either I=0 or I=1. The states we found are consistent with KN scattering states which are checked to exhibit the expected volume dependence of the spectral weight. The results are based on overlap-fermion propagators on two lattices, 12{sup 3}x28 and 16{sup 3}x28, with the same lattice spacing of 0.2 fm, and pion mass as low as {approx}180 MeV.

• OSTI ID: 20705365
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 7; Other Information: DOI: 10.1103/PhysRevD.70.074508; (c) 2004 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
BAG MODEL
BARYONS
KAON-NUCLEON INTERACTIONS
LATTICE FIELD THEORY
MEV RANGE
PARITY
PIONS
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUARKS
RESONANCE PARTICLES
REST MASS
SCATTERING
SPIN