Polarization in elastic antiproton-proton scattering between 0.9 and 2.5 GeV/c

Antiproton-proton partial-wave analysis below 925 MeV/c

“…[104] and the data at 910 MeV/c of Ref. [132] we find these pre-LEAR data to be consistent. An accurate measurement of the backward elastic differential cross section at cos θ = −0.994 was done by Alston-Garnjost et al [117] between 406 and 922 MeV/c.…”

“…In the pre-LEAR era a very large part of the experimental data on pp scattering consisted of elastic differential cross sections [110,104,129,132,128,113]. The most accurate data were those taken by Eisenhandler et al at 690, 790, and 860 MeV/c (and higher momenta) [128].…”

“…Some of the most important results coming from LEAR are the high-quality elastic analyzing-power A y (polarization) data, measured by the PS172 [122,123] and PS198 [130,120] collaborations at a number of energies above 439 MeV/c. Since in the pre-LEAR era only very few and inaccurate data points existed [132,127,131], these experiments mean real progress. We find the data of PS172 and PS198 to be consistent, except for their normalizations.…”

Antinucleon–nucleon interaction at low energy: scattering and protonium

“…The agreement between the two sets of experimental data is good. Some analysing power data were taken at the CERN PS [332], before LEAR entered into operation, but the error bars are almost an order of magnitude larger, as can be seen in the gure for the data at 910 MeV=c ("combined 0.88 and 0:95 GeV=c data").…”