Absence of evidence for pentaquarks on the lattice

Abstract

We study the question of whether or not QCD predicts a pentaquark state. 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 $(1.8\mathrm{fm}{)}^3\times 3.6\mathrm{fm}$ 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.

17 pages, 5 figures replaced with revised version

References in corpus (16)

• Understanding Pentaquark States in QCD
• A study of pentaquarks on the lattice with overlap fermions
• Penta-quark baryon in anisotropic lattice QCD
• High Statistics Search for the Theta+(1.54) Pentaquark State
• Pentaquark Searches at CDF
• Search for the possible S=+1 Pentaquark states in Quenched Lattice QCD
• Search for the pentaquark resonance signature in lattice QCD
• Pentaquark Searches in Electron-Positron Annihilations and Two-Photon Collisions at LEP
• Spin 3/2 Pentaquark Resonance Signature in Lattice QCD
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• A lattice study of the pentaquark states
• A comprehensive search for the Θ^+ pentaquark on the lattice
• New results on cut-off effects in spectroscopy with the fixed point action
• Search for pentaquarks at Belle
• The Experimental Search for Pentaquark
• A Study of B+->p pbar K+ and a Search for a Theta*++ Pentaquark Candidate in B Decay

Cited by in corpus (5)

• The Physics of the B Factories
• Calculating loops without loop calculations: NLO computation of pentaquark correlators
• More on volume dependence of spectral weight function
• Search for the S=+1 pentaquarks in quenched lattice QCD
• Revisiting the pentaquark episode for lattice QCD