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Type: Journal article
Title: Study of pentaquarks on the lattice with overlap fermions
Author: Mathur, Nilmani
Lee, Frank X.
Alexandru, Andrei
Bennhold, C.
Chen, Yanbei
Dong, Shao-Jing
Draper, Terrence
Horvath, Ivan
Liu, K. F.
Tamhankar, Sonali
Zhang, Jian-Bo
Citation: Physical Review D, 2004; 70(7):074508
Publisher: American Physical Society
Issue Date: 2004
ISSN: 0556-2821
School/Discipline: School of Chemistry and Physics : Physics and Mathematical Physics
Statement of
N. Mathur, F. X. Lee, A. Alexandru, C. Bennhold, Y. Chen, S. J. Dong, T. Draper, I. Horváth, K. F. Liu, S. Tamhankar, and J. B. Zhang
Abstract: We present a quenched lattice QCD calculation of spin-1/2 five-quark states with uudds̅ 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, 12³×28 and 16³×28, with the same lattice spacing of 0.2 fm, and pion mass as low as ∼180  MeV.
Rights: ©2004 American Physical Society
DOI: 10.1103/PhysRevD.70.074508
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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