Vector and tensor analyzing powers of elastic deuteron-proton scattering at 130 MeV deuteron beam energy

High precision vector and tensor analyzing power data of the deuteron-proton elastic scattering at 130 MeV deuteron beam energy have been measured in a large range of angles. They are compared with theoretical predictions obtained in various approaches: with realistic potentials for pure $\mathit{NN}$ interactions, with the inclusion of a three-nucleon force, and in the framework of chiral perturbation theory. All the theoretical calculations describe roughly the main features of the measured distributions, but none of them can reproduce all their details. This indicates the need for further development of the three-nucleon force models.

Figure 1

Ratios $f_P^{\theta }(\phi )$ for six different polarization states for one chosen polar angle ${\theta }_d^{\mathrm{c}.\mathrm{m}.}=128.7^{°}$ (symbols). The error bars represent statistical uncertainties. The nominal (maximal) polarization values are indicated in the panels. The lines are the results of the fit, as described in the text.

Figure 2

Vector and tensor analyzing powers for $d$p elastic scattering at 130 MeV: this work (dots), data from Ref. [18] (squares), and RIKEN data [20] (triangles). Theoretical predictions of different approaches are shown as lines and bands, as specified by the legend in the panel.

Figure 3

Net effect of 3NF for the $T_{22}$ data measured at beam energies of 130 MeV (full dots, this work; open triangles, Ref. [20]) and 140 MeV (full triangles, Ref. [12]).