Hadron Spectroscopy using Anisotropic Clover Lattices 

ProposalsContact: David Richards (dgr(a)jlab.org) 2012In order to really understand QCD and hence test whether it is the complete theory of the strong interaction, we must determine the spectrum of mesons and baryons that it implies and test those spectra against high quality experimental measurements. The complete combined analysis of available experimental data on the photoproduction of nucleon resonances, and the measurement of the electromagnetic properties of the lowlying baryons are the HP3 and HP7 DOE milestones in hadronic physics, with theory support integral to the current and future experimental program; the experimental investigation of the meson resonance spectrum, and in particular the search for mesons with exotic quantum numbers, is the aim of the GlueX Collaboration at JLab@12GeV, and the target of a new milestone HP15 (2018). Given the current intense experimental efforts in hadron spectroscopy, the need to predict and understand the hadron spectrum from first principles calculations in QCD is clear. Hence, we have a multiyear program aimed at a comprehensive study of the meson and baryon resonance spectrum, with the continuum quantum numbers of the extracted states reliably identified. Beyond determining the excitedstate spectrum, we aim to explore the properties of some of these states through the investigation of the electromagnetic form factors and transition matrix elements, providing vital input to experimental studies for both baryons and mesons, for exampling by informaing expected production rates at GlueX. Our program exploits the anisotropic clover gauge configurations, designed for spectroscopy, generated under the proposal of Edwards et al.. 201220112010
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Last updated 20130912 