Relation between Axx and Ayy in pd radiative capture

We have measured A$_{xx}$ and A$_{yy}$ of \textit{pd} radiative capture at $E_{d}$ = 200 MeV and 140 MeV. A vertically polarized d-beam was incident on a liquid hydrogen target, and $^{3}$He recoils were detected in vertical and horizontal planes to measure A$_{xx}$ and A$_{yy}$, respectively. Polarization of the d-beam was measured during the experiment using the maximum value of A$_{yy}$ in the angular distribution of \textit{dp} scattering. The polarimeter A$_{yy}$ at 200 MeV was calibrate using $^{12}$C($d$,$^{4}$He) reaction at zero degree in a separate experiment. Measured A$_{xx}$ and A$_{yy}$ of \textit{pd} radiative capture have nearly equal values at 200 and 140 MeV, also at 17.5 MeV in our previous experiment. The relation A$_{xx} \quad \sim $ A$_{yy }$in\textit{ pd} capture is curious one because, so far as we know, all the reactions other than \textit{pd} capture (and probably \textit{dd} capture) have the relation A$_{xx} \quad \sim $ - A$_{yy}$. Calculated A$_{xx}$ and A$_{yy}$ of \textit{pd} capture are nearly equal below 50 MeV, and become separate at higher energy. As a result, large difference between the calculation and experiment of A$_{xx}$ is seen at 140-200 MeV. Recently A$_{xx}$ and A$_{yy}$ of \textit{pd} capture have been measured. The relation A$_{xx} \quad \sim $ A$_{yy}$ seems to hold, however, the absolute values of A$_{xx}$ and A$_{yy}$ are different with ours.