1−+exotic meson at light quark masses

2005/09/30 by J. N. Hedditch, W. Kamleh, Waseem Kamleh +7 · 2 citations
Chemistry · Mathematics · Physics and Astronomy · #Algorithm #Chemistry #Crystallography #Hadron #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Mathematical physics #Mathematics #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Strangeness #hep-lat

paper · pdf · doi:10.1103/physrevd.72.114507

published as Phys.Rev.D72:114507,2005 · 8 pages, 11 figures, 3 tables, published version

openalex publication_date 2005/12/16 · arxiv created 2006/01/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The mass of the 1^\ensuremath-+ exotic meson, created with hybrid interpolating fields, is explored in numerical simulations of quenched QCD on large (20³\ifmmode×\else\texttimes\fi40) lattices to obtain good control of statistical and finite volume errors. Using the Fat-Link Irrelevant Clover (FLIC) fermion action, the properties of the 1^\ensuremath-+ are investigated at light quark masses approaching 25 MeV (m_\ensuremathπ/m_\ensuremathρ\ensuremath≃1/3). Under the standard assumption that the coupling to the quenched a₁\ensuremathη^\ensuremath' channel comes with a negative metric, our results indicate that the 1^\ensuremath-+ exotic exhibits significant curvature close to the chiral limit, suggesting previous linear extrapolations have overestimated the mass of the 1^\ensuremath-+. We find for the first time in lattice studies a 1^\ensuremath-+ mass consistent with the \ensuremathπ₁(1600) candidate. We also find a strangeness \ifmmode±\else\textpm\fi1 J^P=1^\ensuremath- state with a mass close to 2 GeV.

Citations

• Hybrid Monte Carlo algorithm with fat link fermion actions
• General Algorithm for Improved Lattice Actions on Parallel Computing Architectures
• Calibration of smearing and cooling algorithms in SU(3)-color gauge theory
• Exotic hybrid mesons from improved Kogut-Susskind fermions
• Leading quenching effects in the proton magnetic moment
• Chiral analysis of quenched baryon masses
• Scaling of fat-link irrelevant-clover fermions
• Topological charge evolution in the Markov chain of QCD
• Chiral and continuum extrapolation of partially-quenched lattice results
• Improved chiral properties of FLIC fermions
• Improved smoothing algorithms for lattice gauge theory
• Highly improved lattice field-strength tensor
• Chiral extrapolations and exotic meson spectrum
• Exotic Meson Decay toωπ0π−
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Novel fat-link fermion actions

Cited by

• Decay width of light quark hybrid meson from the lattice
• Light exotics: Molecular resonances