2004/03/31 by Ting-Wai Chiu, Tung-Han Hsieh, Tung‐Han Hsieh · 33 citations
Physics and Astronomy · #Baryon #Crystallography #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.72.034505
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 72(3) (American Physical Society) · LaTeX, 23 pages, 11 EPS figures, to appear in Physical Review D
arxiv created 2005/08/01 · openalex publication_date 2005/08/15 · arxiv updated 2011/02/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the mass spectrum of the pentaquark baryon (ududs) in quenched lattice QCD with exact chiral symmetry. Using three different interpolating operators for \ensuremathΘ, we measure the 3\ifmmode×\else\texttimes\fi3 correlation matrix and obtain the eigenvalues A^\ifmmode±\else\textpm\fi(t) with \ifmmode±\else\textpm\fi parity for 100 gauge configurations generated with Wilson gauge action at \ensuremathβ=6.1 on the 203\ifmmode×\else\texttimes\fi40 lattice. For the lowest-lying JP=1/2^\ensuremath- state, its mass is almost identical to that of the KN s wave, while for the lowest-lying JP=1/2+ state, its mass is smaller than that of the KN p wave, especially for the regime mu<ms. By chiral extrapolation (linear in m_\ensuremathπ2) to m_\ensuremathπ=135 MeV, we obtain the masses of the lowest-lying states: m(1/2^\ensuremath-)=1424(57) MeV and m(1/2+)=1562(121) MeV, in agreement with the masses of mK+mN\ensuremath≃1430 MeV and \ensuremathΘ+(1540), respectively.