Angular dependence of theppelastic-scattering analyzing power between 0.8 and 2.8 GeV. II. Results for higher energies

Abstract

Measurements at 18 beam kinetic energies between 1975 and 2795 MeV and at 795 MeV are reported for the pp elastic-scattering single spin parameter A ooon ϭA oono ϭA N ϭ P. The c.m. angular range is typically 60-100°. These results are compared to previous data from Saturne II and other accelerators. A search for energy-dependent structure at fixed c.m. angles is performed, but no rapid changes are observed.

Excitation functions of the analyzing power in elastic proton-proton scattering from 0.45 to 2.5 GeV

“…A complete listing of previous analyzing power measurements in the kinetic energy range 0.45-2.5 GeV can be found in the SAID database [14]. Recent measurements at discrete kinetic energies T lab >1 GeV are from the SATURNE II facility [47,48,49,50,51,52]. At lower kinetic energies T lab <1.0 GeV high precision measurements of the analyzing power at discrete energies have been performed at LAMPF [53,54,55] and recently at IUCF [56,57,58,59].…”

Proton-proton scattering above 3 GeV/c

“…18 depicts the analyzing powers for pp scattering at beam momenta of 3.01 and 3.75 GeV/c. The data are from measurements at SATURNE [27] and at ZGS ANL [67]. At the beam momentum of 3.01 GeV/c our [27], while the squares are the results from ZGS ANL [67].…”

“…At the COSY facility data were taken [24,25] at beam momenta from 1 to 3.3 GeV/c and for scattering angles from 30 • to 90 • . At SATURNE the measurements were done [27,28] at beam momenta from 2.57 to 3.61 GeV/c and for proton scattering angles typically from 60 • to 100 • . In addition, within this momentum range there are analyzing powers available from ZGS ANL [62,63].…”

“…Analyzing power for pp elastic scattering as a function of the four-momentum transfer squared t for different beam momenta (in GeV/c) as indicated in the figure. The triangles are data from SATURNE [28,26,68], the squares are from ZGS ANL [66,67,70], and the open circles are from CERN PS [69]. The shaded bands illustrate the uncertainty of our calculation.…”

“…The most recent extensive measurements of pp scattering were done by the EDDA Collaboration at COSY [24,25] and at SATURNE in Saclay [26,27,28,29,30]. These experiments provide a wealth of precise data on differential cross sections and polarizations up to beam momenta of about 3.8 GeV/c.…”