Lattice Q C D Studies of Pentaquarks and Exotics

Lattice QCD Studies of

Pentaquarks and Exotics Anthony G. Williams

Workshop on Computational Hadron Physics, Cyprus, September 14-17, 2005

September 2005 Computational Hadron Physics, Cyprus

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Contents

• Introduction

• Resonance Search in Lattice QCD

• Search for Spin 1/2 Pentaquarks

• Search for Spin 3/2 Pentaquarks

• Search for the 1-+ Exotic Meson

• Conclusions


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Intro to lattice QCD (cont)


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The Pentaquark Resonance Signature in Lattice QCD


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Introduction


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References to work reported here


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Lattice QCD Approach


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Standard lattice resonance signature


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Resonance signatures in Nucleon and Delta channels


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Pentaquark decay channels


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Spin-1/2 Pentaquark resonance results


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Spin-3/2 Pentaquark resonance results


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Pentaquark mass-splitting analysis


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0(3/2)+ Pentaquark mass-splitting analysis


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0(3/2)+ Pentaquark mass-splitting analysis


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Hybrid and exotic mesons from FLIC fermions


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Introduction


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Meson interpolating fields


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Other uses of hybrid-like interpolating fields


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Results for exotics


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FLIC fermions allow access to lower quark masses


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Mass-splitting analysis for the 1-+ meson state


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Conclusions


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Intro to lattice QCD


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TexPoint Color testing


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Another color test slide

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Scaling behavior of quark propagator in full QCD


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Extended BRST and the Landau gauge


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Documents

Lattice Q C D Studies of Pentaquarks and Exotics