Proton-proton bremsstrahlung at 280 MeV

A proton-proton bremsstrahlung experiment has been carried out at TRIUMF using a 280-MeV polarized proton beam impinging on a liquid-hydrogen target. All three outgoing particles were detected: the higher-energy proton in a magnetic spectrometer, the lower-energy proton with plastic scintillators, a...

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Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 1990-05, Vol.41 (9), p.2689-2704
Main Authors: Michaelian, K, Kitching, P, Hutcheon, DA, Abegg, R, Coombes, GH, Dawson, WK, Fearing, HW, Fielding, H, Gaillard, G, Green, P, Greeniaus, LG, Hugi, M, Miller, CA, Neilson, GC, Olsen, WC, Soukup, J, Stevenson, NR, Wesick, J, Workman, RL
Format: Article
Language:English
Subjects:
ACCELERATORS
ANALYZING POWER
BARYON-BARYON INTERACTIONS
BEAMS
BREMSSTRAHLUNG
CHERENKOV COUNTERS
COINCIDENCE SPECTROMETRY
CYCLIC ACCELERATORS
CYCLOTRONS
DIAGRAMS
ELASTIC SCATTERING
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY RANGE
FEYNMAN DIAGRAM
HADRON-HADRON INTERACTIONS
HYDROGEN
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
MAGNETIC SPECTROMETERS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 100-1000
NONMETALS
NUCLEAR MODELS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POLARIZED BEAMS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
RADIATION DETECTORS
RADIATIONS
SCATTERING
SHELL MODELS
SPECTROMETERS 645103 > High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
THRESHOLD ENERGY
TRIUMF CYCLOTRON
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Summary:A proton-proton bremsstrahlung experiment has been carried out at TRIUMF using a 280-MeV polarized proton beam impinging on a liquid-hydrogen target. All three outgoing particles were detected: the higher-energy proton in a magnetic spectrometer, the lower-energy proton with plastic scintillators, and the photon in lead-glass Cherenkov detectors. The experiment shows the first unambiguous evidence for off-shell effects in the free nucleon-nucleon interaction, in that the analyzing powers disagree strongly with the predictions of the soft-photon approximation (which incorporates only on-shell information) but are consistent with the results of calculations using the Bonn and Paris potentials.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.41.2689