Revisiting the pentaquark episode for lattice QCD

Abstract

This work revisits the pentaquark episode, particularly in reference to lattice QCD, to collect in one place the lessons that have been or should be learnt. This also examines whether, and if yes, where, there might be any prospect for future studies of pentaquarks and the role of lattice QCD in it. Tests such as volume dependence, and hybrid boundary conditions to distinguish bound and scattering states are identified as the positives to take forward from this episode. On the other hand it is also observed that pentaquarks with heavier quark content and in the $SU(3{)}_f$ limit may still be worth not forgetting, and in that case lattice QCD may have an important role to play.

arXiv comment7 pages, 4 figures, presented at Lattice 2007, Regensburg, Germany, 30 July - 4 August 2007

References in corpus (16)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Diquarks and Exotic Spectroscopy
• Pentaquark hadrons from lattice QCD
• A study of pentaquarks on the lattice with overlap fermions
• Search for the pentaquark resonance signature in lattice QCD
• Study of $Thet{a}^{+}(udud\bar{s})$ in lattice QCD with exact chiral symmetry
• Experimental Review on Pentaquarks
• Spin 3/2 Pentaquark Resonance Signature in Lattice QCD
• A lattice study of the pentaquark states
• A comprehensive search for the Θ^+ pentaquark on the lattice
• Absence of evidence for pentaquarks on the lattice
• Penta-quark in Anisotropic Lattice QCD
• Search for the Theta^+(1540) in lattice QCD
• Search for the S=+1 pentaquarks in quenched lattice QCD
• The volume dependence of spectral weights and the pentaquark state
• Mass Spectra of Pentaquarks -- Overlap versus Wilson Fermions