Measurement of the Tensor Analyzing Power ${\mathit{T}}_{20}$ for ${\mathit{d}}^{\uparrow }+{}_{}{}^{12}{}_{}{}^{}C\to \mathit{p}\left(0°\right)+\mathit{X}$ in the Region of High Internal Momenta in the Deuteron

The tensor analyzing power $T_{20}$ for the reaction $d^{\uparrow }{+}^{12}\mathrm{C}\to p\left(0°\right)+X$ has been measured in the region of proton internal momenta $k$ in light-cone dynamics up to 1 GeV/ $c$. Measurements have been carried out at Dubna Synchrophasotron with polarized deuteron beam at deuteron momenta up to 9 GeV/ $c$. When $k$ increases the experimental values of $T_{20}$ have a tendency to approach the value ( $-$0.3) obtained by the calculation based on the reduced nuclear amplitude method in which the quark degrees of freedom are taken into account.