Precise Measurement of dp Elastic Scattering at 270 MeV and Three-Nucleon Force Effects

The cross section, the deuteron vector Ayd and tensor analyzing powers Aij, the polarization transfer coefficients Kijy′, and the induced polarization Py′ were measured for the dp elastic scattering at 270 MeV. The cross section and Ayd are well reproduced by Faddeev calculations with modern data-equivalent nucleon-nucleon forces plus the Tucson-Melbourne three-nucleon force. In contrast, Aij, Kijy′, or Py′ are not described by such calculations. These facts indicate the deficiencies in the spin dependence of the Tucson-Melbourne force and call for extended three-nucleon force models