Lattice Q C D Studies of Pentaquarks and Exotics

transcript

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

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

Intro to lattice QCD (cont)

The Pentaquark Resonance Signature in Lattice QCD

Introduction

References to work reported here

Lattice QCD Approach

Standard lattice resonance signature

Resonance signatures in Nucleon and Delta channels

Pentaquark decay channels

Spin-1/2 Pentaquark resonance results

Spin-3/2 Pentaquark resonance results

Pentaquark mass-splitting analysis

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

Hybrid and exotic mesons from FLIC fermions

Introduction

Meson interpolating fields

Other uses of hybrid-like interpolating fields

Results for exotics

FLIC fermions allow access to lower quark masses

Mass-splitting analysis for the 1-+ meson state

Conclusions

Intro to lattice QCD

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Lattice Q C D Studies of Pentaquarks and Exotics

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