Measurement of the Polarization Parameter innpCharge-Exchange Scattering from 2 to 12GeVc

We have measured the polarization parameter in neuton-proton charge-exchange scattering for incident neutron momenta of 2-12 $\frac{\mathrm{GeV}}{c}$ and $0.01<~\mathrm{}\left|t\right|\mathrm{}<~1.0 {\left(\frac{\mathrm{GeV}}{c}\right)}^2$. Results based on 300 000 events show a negative polarization whose magnitude increases monotonically with $\mathrm{}\left|t\right|\mathrm{}$ approaching 60% for $\mathrm{}\left|t\right|\mathrm{}\sim 0.6$ and which has little energy dependence.