Soft-photon analysis of pion-proton bremsstrahlung and the magnetic moment of Delta(1232)

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1992

OSTI ID:5578055

Lin, D

This study rigorously derives a special two-energy-two-angle amplitude for the [pi][sup [+-]]p[gamma] process near the [delta](1232) resonance. In order to take into account bremsstrahlung emission from an internal [delta] line with both charge and the anomalous magnetic moment [lambda]([lambda][sub [delta]] for the [delta][sup ++] and [lambda][sub [delta]][prime] for the [delta][sup 0]), a radiation decomposition identity to modify Low's standard prescription for constructing a soft-photon amplitude has been applied as well as the special two-energy-two-angle amplitude to calculate all [pi][sup [+-]]p[gamma] cross sections which can be compared with the experimental data. Treading [lambda] as a free parameter in these calculations, the magnetic moments of the [delta], [mu][delta] for the [delta][sup ++] and [mu][delta][prime] for the [delta][sup 0], have been extracted from the UCLA data and the SIN data. The average value of [mu][delta] determined from the experimental data is 4.35 e/(2m[sub p]) (m[sub p] is the proton mass), which is in good agreement with the value 4.25 e/(2m[sub p]) predicted by a modified SU(6) model. The average value of [mu][delta][prime] determined from the experimental data is 0.5 e/(2m[sub p]), which is in accord with the value predicted by the SU(6) model. Finally, it is shown that the overall agreement between theory and experiment is excellent if the special two-energy-two-angle amplitude is used in the calculation with the extracted [mu][delta] (or [mu][delta][prime]) as an input.

• Research Organization: City Univ. of New York, NY (United States)
• OSTI ID: 5578055
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYONS
BREMSSTRAHLUNG
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DELTA BARYONS
DELTA-1232 BARYONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
LIE GROUPS
MAGNETIC MOMENTS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
N BARYONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
RADIATIONS
RESONANCE
SIN CYCLOTRON
SU GROUPS
SU-6 GROUPS
SYMMETRY GROUPS
UCLA