Nuclear Lattice Simulations with Chiral Effective Field Theory

Details Nuclear Lattice Simulations with Chiral Effective Field Theory Nuclear Lattice Simulations with Chiral Effective Field Theory

2004-02-23

arxiv.org/abs/nucl-th/0402072v1

Phys.Rev. C70 (2004) 014007

Physics

Nuclear Physics

Nuclear Theory

41 pages, 23 figures

Scientific paper

10.1103/PhysRevC.70.014007

We study nuclear and neutron matter by combining chiral effective field theory with non-perturbative lattice methods. In our approach nucleons and pions are treated as point particles on a lattice. This allows us to probe larger volumes, lower temperatures, and greater nuclear densities than in lattice QCD. The low energy interactions of these particles are governed by chiral effective theory and operator coefficients are determined by fitting to zero temperature few-body scattering data. Any dependence on the lattice spacing can be understood from the renormalization group and absorbed by renormalizing operator coefficients. In this way we have a realistic simulation of many-body nuclear phenomena with no free parameters, a systematic expansion, and a clear theoretical connection to QCD. We present results for hot neutron matter at temperatures 20 to 40 MeV and densities below twice nuclear matter density.

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