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Polarized proton-proton bremsstrahlung

Journal Article · · Phys. Rev. Lett.; (United States)
; ; ; ; ; ; ; ; ;

The cross section and analyzing power for proton-proton bremsstrahlung have been measured at TRIUMF with a 280-MeV polarized proton beam, impinging on a liquid hydrogen target. Both outgoing protons and the outgoing photon were detected in coincidence. A magnetic spectrometer consisting of a dipole and four drift chambers measured the production angle, point of origin in the target, and momentum of one of the outgoing protons. After appropriate cuts were applied, over 160X0 pp..gamma.. events remained, a factor of 20 more than in any previous pp..gamma.. experiment, with a background of only a few percent. We report here on the analyzing-power measurements, which are in good agreement with calculations based on modern potential models of the NN interaction, but which disagree with the predictions of the soft-photon approximation.

Research Organization:
TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
OSTI ID:
6692471
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:19; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANALYZING POWER
BARYON-BARYON INTERACTIONS
BEAMS
BREMSSTRAHLUNG
COINCIDENCE SPECTROMETRY
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
HYDROGEN
INFORMATION
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 100-1000
NONMETALS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PHOTONS
POLARIZED BEAMS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
RADIATIONS
TRIUMF CYCLOTRON