Testing nuclear forces by polarization transfer coefficients in d(p,p)d and d(p,d)p reactions at Ep=22.7 MeV

The proton to proton polarization transfer coefficients Kxx', Kyy', Kzx' and the proton to deuteron polarization transfer coefficients Kxx', Kyy', Kzx', Kxy'z', Kyz'z', Kzy'z', Kyx'z' and Kyx'x'-y'y' have been measured in d((rvec p), (rvec p))d and d((rvec p), (rvec d))p reactions at Eplab = 22.7 MeV, respectively. The data have been compared to predictions of modern nuclear forces obtained by solving the three-nucleon Faddeev equations in momentum space. Realistic (semi) phenomenological nucleon-nucleon potentials combined with model three-nucleon forces and modern chiral nuclear forces have been used. The AV18, CD Bonn, Nijm I and II nucleon-nucleon interactions have been applied alone or combined with the Tucson-Melbourne 99 three-nucleon force, adjusted separately for each potential to reproduce the triton binding energy. For the AV18 potential also the Urbana IX three-nucleon force have been used. In addition chiral NN potentials in the next-to-leading-order and chiral two- and three-nucleon forces in the next-to-next-to-leading-order have been applied. Only when three-nucleon forces are included a satisfactory description of all data results. For the chiral approach the restriction to the forces in the next-to-leading order is insufficient. Only when going over to the next-to-next-to-leading order one gets a satisfactory description of the data, similar to the one obtained with the (semi) phenomenological forces