Polarizations and Angular Distributions in the Elastic Scattering of Pions and Protons from Polarized Protons at Fermilab Energies

Thesis/Dissertation · Mon May 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/1406591· OSTI ID:1406591

Snyder, James Harmon ^[1]

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1. Yale Univ., New Haven, CT (United States)

We report herein measurements of polarizations and angular distributions in the elastic scattering of pions and protons from polarized protons. The data cover the kinematic range 0.2 $$\le$$ -t $$\le$$ 1.6 GeV at incident momenta of 100 GeV for pions and 100 and 300 GeV for protons. The detector was a double-arm spectrometer whose components were multiwire proportional chambers and analysis magnets. · These measurements represent the first polarization measurements at Fermilab-SPS energies, and as such provide new constraints on strong interaction phenomenoloqy. Eikonal models are discussed, with particular ref~rence to .the absorption model of the Michigan school, and the data presented with model fits. The pi polarization data are found to be consistent with the predictions of both this model and of a pure pole Regge model. The pi angular distributions are found to be consistent with existing differential cross-section data, and are more precise for -t > 0.8 Gev2 . The pp polarization data confirm trends suggested by the Serpukhov data, with the low t polarization decreasing more rapidly than would be expected in an exchange degenerate pure pole model, and with the polarization becoming negative and increasing in magnitude with increasing -t. The data are consistent with the model predictions at small and intermediate t, and are suggestive of the structure predicted by this and other models in the region of the dip in the 300 GeV differential cross-section. The pp angular · distributions are again consistent with existing differential cross-section data, with the dip observed in the present data at $$t \approx$$ -1.5 $Gev^2$ .

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1406591
• Report Number(s): FERMILAB-THESIS--1978-05; UMI--78-20802; 133874
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS