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Few- and many-nucleon systems with semilocal coordinate-space regularized chiral two- and three-body forces

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arxiv 1807.02848 v1 pith:PH6O7N27 submitted 2018-07-08 nucl-th nucl-ex

Few- and many-nucleon systems with semilocal coordinate-space regularized chiral two- and three-body forces

E. Epelbaum , J. Golak , K. Hebeler , T. H\"uther , H. Kamada , H. Krebs , P. Maris , U.-G. Mei{\ss}ner
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A. Nogga R. Roth R. Skibi\'nski K. Topolnicki J. P. Vary K. Vobig H. Wita{\l}a
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keywords three-nucleonchiralcoordinate-spaceforceforcesnucleon-deuteronorderregularized
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We present a complete calculation of nucleon-deuteron scattering as well as ground and low-lying excited states of light nuclei in the mass range A=3-16 up through next-to-next-to-leading order in chiral effective field theory using semilocal coordinate-space regularized two- and three-nucleon forces. It is shown that both of the low-energy constants entering the three-nucleon force at this order can be reliably determined from the triton binding energy and the differential cross section minimum in elastic nucleon-deuteron scattering. The inclusion of the three-nucleon force is found to improve the agreement with the data for most of the considered observables.

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  1. Challenging chiral EFT with tritium beta decay

    nucl-th 2026-06 unverdicted novelty 6.0

    Chiral EFT predictions at N2LO for the tritium Gamow-Teller matrix element, with parameters fixed from scattering, overestimate the empirical value and indicate large higher-order corrections.