Measurement ofσtotin Proton-Proton Scattering in Pure Spin States

Measurement of the transverse spin dependence of the pp total cross section in the 1–3 GeV/c region

“…Both of these crosssection differences might be expected to show striking structure as a function of energy as the thresholds for the production of various N*'s are crossed [2-61. Previous measurements of AU, have indeed indicated a strong energy dependence in the range 2-3 GeV/c [7,8]. We have extended the measurement of AuT over the range l-3 GeV/c.…”

Measurement of proton proton elastic scattering in pure initial spin states at 11.75 GeV/c

“…1. This was very simi-lar to the polarimeter used in our earlier measurements [4,6,7] and was only modified slightly to operate at 11.75 GeV/c. At this energy the asymmetry parameter, A, is only about 5% in the diffraction peak but is much larger at large p2.…”

“…This spin dependence was first studied successfully using the polarized proton targets at Berkeley [1], CERN [2], and Argonne [3]. During the past few years the ZGS polarized beam has allowed new and even more precise measurements of the elastic spin dependence [4][5][6][7]. Recently the polarized beam operated at 11.75 GeV/c allowing the first measurements of pure spin elastic cross sections above 6 GeV/c.…”

Simultaneous measurement of 2 and 3 spins in proton proton elastic scattering at

“…The PPT II target used for our earlier Supported by a research grant from the U.S. Atomic Energy Commission. runs [4,5] gave about 35%.…”