Few-nucleon systems with state-of-the-art chiral nucleon-nucleon forces

Authors :: Binder, S.
Calci, A.
Epelbaum, E.
Furnstahl, R. J.
Golak, J.
Hebeler, K.
Kamada, H.
Krebs, H.
Langhammer, J.
Liebig, S.
Maris, P.
Meißner, U. -G.
Minossi, D.
Nogga, A.
Potter, H.
Roth, R.
Skibinski, R.
Topolnicki, K.
Vary, J. P.
Witala, H.
Source :: Phys. Rev. C 93, 044002 (2016)
Publication Year :: 2015
Abstract: 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 3H, 4He, and 6Li. 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.<br />Comment: 5 pages, 5 figures

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