Few-nucleon systems with state-of-the-art chiral nucleon-nucleon forces Article Swipe
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.1103/physrevc.93.044002
· OA: W1900062776
We apply improved nucleon-nucleon potentials up to fifth order in chiral effective field theory, along with a new analysis of the theoretical truncation errors to study nucleon-deuteron (Nd) scattering and selected low-energy observables in H3,He4, and Li6. Calculations beyond second order differ from experiment well outside the range of quantified uncertainties, providing truly unambiguous evidence for missing three-nucleon forces within the employed framework. The sizes of the required three-nucleon-force contributions agree well with expectations based on Weinberg's power counting. We identify the energy range in elastic Nd scattering best suited to study three-nucleon-force effects and estimate the achievable accuracy of theoretical predictions for various observables.
