Cross Section Minima in Elastic Nd Scattering: Possible Evidence for Three-Nucleon Force Effects

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Neutron-deuteron elastic scattering cross sections are calculated at different energies using modern nucleon-nucleon ( NN) interactions and the Tucson-Melbourne three-nucleon force adjusted to the triton binding energy. Predictions based on NN forces only underestimate nucleon-deuteron data in the minima at higher energies starting around 60 MeV. Adding the three-nucleon forces fills up those minima and reduces the discrepancies significantly.

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