Forward angle quasi-free proton-neutron analyzing powers at 0. 8 GeV

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5302911

Barlett, M L

As the first step in determining the nucleon-nucleon scattering amplitudes at 0.8 GeV, quasi-free p Vector + n and p Vector + p analyzing powers were obtained at laboratory scattering angles from 6/sup 0/ to 32.9/sup 0/ by scattering 800 MeV polarized protons from a liquid deuterium target. Forward scattered protons were detected by the High Resolution Spectrometer (HRS) while recoil neutrons and protons were detected in coincidence with the event detected with the HRS by a 5 x 5 array of scintillators. A thin scintillator placed between the target and the array enabled discrimination of recoil particle type and facilitated the simultaneous measurement of both p Vector n and p Vector p analyzing powers. A comparison of the results with previously measured free p Vector p and n Vector p analyzing powers shows excellent agreement between the free and quasi-free p Vector p analyzing powers. Poorer agreement is seen for the p Vector n analyzing powers. The results of phase-shift analyses are presented in order to study the effects of the quasi-free analyzing power measurements on the determination of the pn scattering amplitudes. Amplitudes obtained from the phase-shift analyses are then used in KMT calculations. The results indicate that further nucleon-nucleon measurements are necessary in order to unambiguously determine the nucleon-nucleon amplitudes at 800 MeV.

• Research Organization: Texas Univ., Austin (USA)
• OSTI ID: 5302911
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANALYZING POWER
BARYON-BARYON INTERACTIONS
BEAMS
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PHASE SHIFT
POLARIZED BEAMS
PROTON-NEUTRON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
SCATTERING AMPLITUDES