Absence of evidence for pentaquarks on the lattice

2005/04/30 by Kieran Holland, K. Jimmy Juge, Keisuke Jimmy Juge · 9 citations
Physics and Astronomy · #Excited state #High-Energy Particle Collisions Research #Isospin #Lattice (music) #Lattice QCD #Lattice field theory #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Pentaquark #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-ex #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.73.074505

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 73(7) (American Physical Society) · 17 pages, 5 figures replaced with revised version

openalex publication_date 2006/04/14 · arxiv created 2006/05/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the question of whether or not QCD predicts a pentaquark state \ensuremathΘ⁺. We use the improved, fixed point lattice QCD action which has very little sensitivity to the lattice spacing and also allows us to reach light quark masses. The analysis was performed on a single volume of size (1.8 fm)³\ifmmode×\else\texttimes\fi3.6 fm with lattice spacing of a=0.102 fm. We use the correlation matrix method to identify the ground and excited states in the isospin 0, negative parity channel. In the quenched approximation where dynamical quark effects are omitted, we do not find any evidence for a pentaquark resonance in QCD.

Citations

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