PoS - Proceedings of Science
Volume 430 - The 39th International Symposium on Lattice Field Theory (LATTICE2022) - Nuclear Physics
Nucleon-nucleon scattering from distillation
J. Green*, A. Hanlon, P. Junnarkar, H. Wittig and  for the Baryon Scattering (BaSc) collaboration
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Pre-published on: March 22, 2023
Published on: April 06, 2023
We report an ongoing analysis of nucleon-nucleon scattering based on finite-volume spectroscopy. The calculation is performed using the distillation method on eight lattice ensembles at the SU(3)-symmetric point with $m_\pi=m_K\approx 420$ MeV generated by CLS, covering a range of lattice spacings and volumes and previously used to study the $H$ dibaryon. We obtain nonzero signals for $S$, $P$, $D$, and $F$ waves as well as the mixing between spin-1 $S$ and $D$ waves. For $S$ waves, lattice artifacts are significant and tend to strengthen baryon-baryon interactions. In the deuteron and dineutron $S$ waves, we find virtual bound states.
DOI: https://doi.org/10.22323/1.430.0200
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