Tensor Analyzing Power ind−pScattering at Backward Angles for Deuteron Energies 0.3 to 2.3 GeV

The tensor analyzing power $T_{20}$ for $d-p$ elastic scattering at or near ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=180\mathrm{}°$ has been measured at sixteen deuteron beam energies between 0.3 and 2.3 GeV. In marked disagreement with earlier work, large negative values ($\left|T_{20}\right|>\mathrm{}0.6\mathrm{}$) are found at all energies in this range, with a dip to $T_{20}=-1.25\mathrm{}$ at $T_d=0.5\mathrm{}$ GeV. The present results are compared with various model calculations.