Cross section and transverse polarization transfer for theH2(p,n)2p reaction at 160 MeV

The cross section and transverse polarization transfer for the ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(p,n)2p reaction at $E_{\mathrm{p}=160\mathrm{}}$ MeV and theta=0° have been measured with good energy resolution (1 MeV). An asymmetric peak shape characteristic of the ${}_{}{}^1{}_{}{}^{}\mathrm{S}_0^{}{}_{}{}^{}$ final-state interaction of the residual two-proton system has been clearly observed. The measured transverse polarization transfer coefficient for this peak is $D_{\mathrm{NN}}$(0?(de)=-0.43±0.04. A simple impulse approximation calculation including the ${}_{}{}^1{}_{}{}^{}\mathrm{S}_0^{}{}_{}{}^{}$ final-state interaction reproduces the main features of the observed peak shape and polarization transfer. Small discrepancies observed in the peak tail region can be accounted for by including the ${}_{}{}^3{}_{}{}^{}\mathrm{P}_0^{}{}_{}{}^{}$,1,2 final state interaction.