Spectra and scattering of light lattice nuclei from effective field theory

J. Kirscher, N. Barnea, D. Gazit, F. Pederiva, U. Van Kolck

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

An effective field theory is used to describe light nuclei, calculated from quantum chromodynamics on a lattice at unphysically large pion masses. The theory is calibrated at leading order to two available data sets on two- and three-body nuclei for two pion masses. At those pion masses we predict the quartet and doublet neutron-deuteron scattering lengths, and the α-particle binding energy. For mπ=510 MeV we obtain, respectively, 4anD=2.3±1.3 fm, 2anD=2.2±2.1 fm, and Bα=35±22 MeV, while for mπ=805 MeV 4anD=1.6±1.3 fm, 2anD=0.62±1.0 fm, and Bα=94±45 MeV are found. Phillips- and Tjon-like correlations to the triton binding energy are established. We find the theoretical uncertainty in the respective correlation bands to be independent of the pion mass. As a benchmark, we present results for the physical pion mass, using experimental two-body scattering lengths and the triton binding energy as input. Hints of subtle changes in the structure of the triton and α particle are discussed.

Original languageEnglish (US)
Article number054002
JournalPhysical Review C - Nuclear Physics
Volume92
Issue number5
DOIs
StatePublished - Nov 17 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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