Measurement of A/sub N/ and A/sub NN/ for the reaction pp. -->. d. pi. /sup +/ at six energies from 500 to 800 MeV

Technical Report · Sat Oct 01 04:00:00 EDT 1983

OSTI ID:5308572

Tippens, W B

The values of A/sub n/ and A/sub nn/ for the reaction pp ..-->.. d..pi../sup +/ have been measured at six beam kinetic energies: 500, 600, 650, 700, 733, and 800 MeV. The angular distributions of the pion in the center of mass system range from 30/sup 0/ to 110/sup 0/. The results indicate that A/sub nn/ is largely negative (approx. -1) for the entire energy region with a small minimum at THETA/sub ..pi..//sup */ = 90/sup 0/. It is seen that the large negative values for A/sub nn/ indicate the dominance of singlet-triplet transitions for this reaction at these energies and disagree strongly with a present phase shift analysis. The A/sub nn/ data also contain more angular dependence than predicted by present theoretical models but much less than that predicted by the phase shift analysis. A/sub n/ has a maximum value of approximately +0.3 over this energy region with a rapidly changing minimum near THETA/sub ..pi..//sup */ = 90/sup 0/ which goes from -0.1 at 500 MeV to nearly the maximum at 650 MeV, back down to +0.2 at 800 MeV. These data indicate a smaller maximum value for A/sub n/ and more angular dependence than present theories predict. 40 references.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5308572
• Report Number(s): LA-9909-T; ON: DE84006400
• Country of Publication: United States
• Language: English

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645103 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
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A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYON RESONANCES
BARYON-BARYON INTERACTIONS
BARYONS
BOSONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DATA
DELTA-1236 RESONANCES
DEUTERONS
DIBARYON RESONANCES
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYDROGEN 1 TARGET
INFORMATION
INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
N RESONANCES
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PIONS
PIONS PLUS
POLARIZATION-ASYMMETRY RATIO
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
TARGETS