Lattice Hadron Physics Collaboration

The only known way to solve ¼ Quantum Chromodynamics (QCD) is a numerical solution on a discrete space-time lattice. Quantitative solution of QCD is essential to extract the full physics potential of present and proposed experiments at frontier nuclear physics facilities. – from FY2000 proposal to Department of Energy/HENP.

The Lattice Hadron Physics Collaboration (LHPC) is a collaboration of scientists interested in first-principles calculations of hadron structure through lattice gauge theory calculations. It comprises over twenty senior scientists, together with associated post-doctoral and graduate researchers, representing over ten US institutions.

Motivation

· Lattice QCD is the only known way to calculate the structure of hadrons from first principles

· Lattice calculations are essential to extract physics from major experimental studies of hadron structure

· Fundamental problems can be solved with adequate human and computer resources

· Algorithm development is creating new opportunities

· Prior to this initiative

o No computer resources available to the national hadronic physics community

o No collaboration established to perform calculations on the appropriate scale

Institutions

Boston University

University of California, Davis

Carnegie-Mellon University

Duke University

Florida International University

Jefferson Laboratory

University of Kentucky

University of Maryland

MIT

New Mexico State University

Old Dominion University

Pittsburgh University

University of Virginia

George Washington University

Proposals

Nuclear Theory with Lattice QCD, submitted to the US Department of Energy in March 2000, can be found here.

National Computational Infrastructure for Lattice Gauge Theory, submitted to the US Department of Energy SciDAC initiative in March 2001, can be found here.

Physics Projects

Nuclear Theory with Lattice QCD identified four broad, but overlapping, areas around which to organize our research in hadronic physics. Under construction.

· Nucleon Structure

· Spectroscopy

· Hadron-Hadron Interactions

· Fundamental Aspects of QCD

A further crucial component of our work is an understanding of lattice field theory, including, for example, the development of efficient computational algorithms.

Software and Hardware

LHPC uses the SZIN QCD Software System.

Details of the JLAB and MIT clusters, and of the development of cluster software tools, can be reached from the pages of the High Performance Computing Group at Jefferson Laboratory.