Angular distributions of the vector $A_y$ and tensor $A_{yy}$, $A_{xx}$, $A_{xz}$ analyzing powers in the $\vec{d}d\to {}^3\text{H}p$ reaction at 200 MeV

A complete set of analyzing powers for the $\vec{d}d\to {}^3\text{H}p$ reaction at the kinetic beam energy of 200 MeV has been measured in the full angular range in the c.m. frame. The observed signs of the tensor analyzing powers $A_{yy}$, $A_{xx}$, and $A_{xz}$ at forward and backward directions have clearly demonstrated the sensitivity to the ratio of the $D$- and $S$-wave components of the triton and deuteron, respectively. The new high-precision data are compared with the prediction of the relativistic multiple-scattering model by using standard wave functions of the three-nucleon bound state and of the deuteron.

Figure 1

The $C{D}_2-C$ subtraction for the $\vec{d}d\to {}^3\text{H}p$ reaction at $T_d=200$ MeV. The open and shadowed histograms in the left panels correspond to the yields from the $C{D}_2$ and carbon targets, respectively. The right panels demonstrate the quality of the $C{D}_2-C$ subtraction. The panels (a), (b), (c), and (d) correspond to the ${}^3\text{H}$ scattering angles in the c.m. frame of ${12}^{\circ }$, ${56}^{\circ }$, ${144}^{\circ }$, and ${168}^{\circ }$, respectively.

Figure 2

Results for the vector $A_y$ and tensor $A_{yy}$, $A_{xx}$, $A_{xz}$ analyzing powers in the $\vec{d}d\to {}^3\text{H}p$ reaction at 200 MeV. The dashed and solid lines are theoretical calculations taking into account the ONE and the $\text{ONE}+\text{SS}$ contributions, respectively.