Acceleration of polarized protons to 22 GeV/c and the measurement of spin-spin effects in p/sub up-arrow/+p/sub up-arrow/. -->. p+p

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.39.45· OSTI ID:6551820

Khiari, F Z; Cameron, P R; Court, G R; Crabb, D G; Fujisaki, M; Gialas, I; Hansen, P H; Hejazifar, M E; Krisch, A D; Lin, A M.T.; others, and

Accelerating polarized protons to 22 GeV/c at the Brookhaven Alternating Gradient Synchro- tron required both extensive hardware modifications and a difficult commissioning process. We had to overcome 45 strong depolarizing resonances to maintain polarization up to 22 GeV/c in this strong-focusing synchrotron. At 18.5 GeV/c we measured the analyzing power A and the spin-spin correlation parameter A/sub n//sub n/ in large- P/sub perpendicular//sup 2/ proton-proton elastic scattering, using the polarized proton beam and a polarized proton target. We also obtained a high-precision measurement of A at P/sub perpendicular//sup 2/ = 0.3 (GeV/c)/sup 2/ at 13.3 GeV/c. At 18.5 GeV/c we found that A/sub n//sub n/ = (-2 +- 16)% at P/sub perpendicular//sup 2/ = 4.7 (GeV/c)/sup 2/, where it was about 60% near 12 GeV at the Argonne Zero Gradient Synchrotron. This sharp change suggests that spin-spin forces may have a strong and unexpected energy dependence at high P/sub perpendicular//sup 2/.

• Research Organization: Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan 48109
• OSTI ID: 6551820
• Journal Information: Phys. Rev. D; (United States), Vol. 39:1
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON-PROTON INTERACTIONS
ANALYZING POWER
ELASTIC SCATTERING
ANGULAR DISTRIBUTION
CROSS SECTIONS
ENERGY DEPENDENCE
GEV RANGE 10-100
J-J COUPLING
POLARIZED BEAMS
POLARIZED TARGETS
TRANSVERSE MOMENTUM
ZGS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BEAMS
COUPLING
CYCLIC ACCELERATORS
DISTRIBUTION
ENERGY RANGE
GEV RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE COUPLING
LINEAR MOMENTUM
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
SCATTERING
SYNCHROTRONS
TARGETS
645103* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties