Study of pentaquarks on the lattice with overlap fermions

2004/06/30 by Nilmani Mathur, N. Mathur, F. X. Lee +14 · 9 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevd.70.074508

published as Phys.Rev.D70:074508,2004 · accepted for publication in Phys. Rev. D

arxiv created 2004/09/10 · openalex publication_date 2004/10/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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, 12³\ifmmode×\else\texttimes\fi28 and 16³\ifmmode×\else\texttimes\fi28, with the same lattice spacing of 0.2 fm, and pion mass as low as \ensuremath∼180 MeV.

Citations

• Understanding Pentaquark States in QCD

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