Nucleon-deuteron capture with chiral potentials
R. Skibinski, J. Golak, H. Witala, W. Gloeckle, A. Nogga, E. Epelbaum
Abstract
Present day chiral nucleon-nucleon potentials up to N3LO and three nucleon forces at N2LO are used to analyze nucleon-deuteron radiative capture at deuteron lab energies below Ed= 100 MeV. The differential cross section and the deuteron analyzing powers Ay(d) and Ayy are presented and compared to data. The theoretical predictions are obtained in the momentum-space Faddeev approach using the nuclear electromagnetic current operator with exchange currents introduced via the Siegert theorem. The chiral forces provide the same quality of data description as a combination of the two-nucleon AV18 and the three-nucleon Urbana IX interactions. However, the different parametrizations of the chiral potentials lead to broad bands of predictions.
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