Bulletin of the American Physical Society
2009 APS April Meeting
Volume 54, Number 4
Saturday–Tuesday, May 2–5, 2009; Denver, Colorado
Session C3: Lattice QCD for Nuclear Physics |
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Sponsoring Units: DNP DCOMP Chair: David Richards, Thomas Jefferson National Accelerator Facility Room: Plaza E |
Saturday, May 2, 2009 1:30PM - 2:06PM |
C3.00001: Nucleons in lattice QCD - computational challenges and physics opportunities Invited Speaker: An overview is given of contemporary computational challenges in studying the properties of nucleons and other hadrons using lattice QCD. Drawing motivation from an introductory sketch of the physical principles underlying such studies and their implementation on a space-time lattice, the concrete computational and data management tasks involved in state-of-the-art lattice calculations are examined. Possibilities and limitations in carrying out these tasks are discussed in light of presently available hardware and the software and systems infrastructure developed by the lattice QCD community. On the basis of this discussion, current opportunities for breaking new ground in lattice QCD studies of nucleons and other hadrons are highlighted. [Preview Abstract] |
Saturday, May 2, 2009 2:06PM - 2:42PM |
C3.00002: Using LQCD to answer questions about hadronic interactions: a perspective from a traditional nuclear theorist Invited Speaker: As computational resources increase and better algorithms are implemented, LQCD calculations of hadronic interaction observables become less of a pipe dream, and more of a reality, and will eventually become the status quo. One of the greatest strengths of LQCD calculations in the realm of low-energy nuclear physics comes from its predictive capability, as many hadronic systems not accessible by experiments can be calculated on the lattice. These calculations in turn have direct implications to nuclear structure, nuclear reactions, and nuclear astrophysics, as well as the broader nuclear physics community. Thus the import of LQCD on low-energy nuclear physics cannot be overlooked, nor understated. In this talk I discuss current and ongoing efforts to extract hadronic interaction parameters from LQCD, enumerating current difficulties placed by available computer resources and algorithm limitations. I will also talk about future possibilities coming from increased computer resources and algorithm development, giving examples of how such calculations can answer longstanding questions in traditional nuclear physics. Finally, I will discuss the role that national labs can and should play in the area of LQCD as applied to low-energy nuclear physics. [Preview Abstract] |
Saturday, May 2, 2009 2:42PM - 3:18PM |
C3.00003: Thermodynamics of strongly interacting elementary particles Invited Speaker: We discuss progress made in studies of the thermodynamics of strongly interacting matter through lattice simulations of QCD. We present results on the QCD equation of state obtained with almost physical light and strange quark masses and discuss fluctuations and correlations of conserved charges in matter with vanishing net baryon number density. We, furthermore, will review recent studies of transport coefficients on the lattice as well as attempts to determine the elusive critical point expected to exist in the QCD phase diagram at non-zero baryon number density. [Preview Abstract] |
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