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Ground-state energy of dilute neutron matter at next-to-leading order in lattice chiral effective field theory

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Abstract

We present lattice calculations for the ground-state energy of dilute neutron matter at next-to-leading order in chiral effective field theory. This study follows a series of recent papers on low-energy nuclear physics using chiral effective field theory on the lattice. In this work we introduce an improved spin- and isospin-projected leading-order action which allows for a perturbative treatment of corrections at next-to-leading order and smaller estimated errors. Using auxiliary fields and Euclidean-time projection Monte Carlo, we compute the ground state of 8, 12, and 16 neutrons in a periodic cube, covering a density range from 2% to 10% of normal nuclear density.

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Authors and Affiliations

  1. Institut für Kernphysik (IKP-3) and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany

    E. Epelbaum, H. Krebs & U. -G. Meißner

  2. Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany

    E. Epelbaum, H. Krebs, D. Lee & U. -G. Meißner

  3. Department of Physics, North Carolina State University, 27695, Raleigh, NC, USA

    D. Lee

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  1. E. Epelbaum
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  3. D. Lee
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  4. U. -G. Meißner
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Correspondence to D. Lee.

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Epelbaum, E., Krebs, H., Lee, D. et al. Ground-state energy of dilute neutron matter at next-to-leading order in lattice chiral effective field theory. Eur. Phys. J. A 40, 199–213 (2009). https://doi.org/10.1140/epja/i2009-10755-0

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