Analyzing power measurements in high-P/sub perpendicular to//sup 2/ p-p elastic scattering

Conference · Wed May 23 04:00:00 EDT 1984

OSTI ID:6718148

Raymond, R S; Brown, K A; Bruni, R J; Cameron, P R; Crabb, D G; Cummings, R L; Khiari, F Z; Krisch, A D; Lin, A M.T.; Terwilliger, K M

The analyzing power in 28 GeV/c proton-proton elastic scattering was measured at P/sub perpendicular to//sup 2/ = 5.95 and 6.56 (GEV/c)/sup 2/ y/sub g/ a polarized proton target and an unpolarized proton beam at the Brookhaven National Laboratory AGS. Results indicate that the analyzing power, A, is rising sharply with P/sub perpendicular to//sup 2/. Previous measurements of the analyzing power, A, in p + p ..-->.. p + p suggested a rise in A at large-P/sub perpendicular to//sup 2/, but the statistical uncertainty in the highest point at P/sub perpendicular to//sup 2/ = 5.95 (GeV/c)/sup 2/ made it impossible to determine the magnitude of the increase. In an effort to clarify this situation, we made new measurements of A at P/sub perpendicular to//sup 2/ = 5.95 and 6.56 (GeV/c)/sup 2/. An unpolarized beam of typically 5 x 10/sup 10/ 28 GeV/c protons from the AGS at Brookhaven National Laboratory was incident upon the University of Michigan polarized proton target. This target contains irradiated ammonia beads cooled to 0.5/sup 0/K by a /sup 3/He-/sup 4/He evaporation refrigerator, in a 2.5 T magnetic field. The polarizing transitions are driven by a 70 GHz microwave system. The polarization of the hydrogen protons is measured with a 107 MHz NMR system, and is typically P/sub T/ = 45% with beam and 60% without beam.

• Research Organization: Michigan Univ., Ann Arbor (USA). Randall Lab. of Physics; Brookhaven National Lab., Upton, NY (USA); Notre Dame Univ., IN (USA); Maryland Univ., College Park (USA). Dept. of Physics; Texas A and M Univ., College Station (USA). Dept. of Physics
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6718148
• Report Number(s): BNL-34931; CONF-8405193-16; ON: DE84014389
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANALYZING POWER
BARYON-BARYON INTERACTIONS
ELASTIC SCATTERING
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
POLARIZED TARGETS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
SCATTERING
TARGETS
TRANSVERSE MOMENTUM