Color Magnetism and the Helicity Zero ($\gamma$ (Neutrino) $N \to \Delta$) Transition Amplitude

Bourdeau, M.; Mukhopadhyay, N.C.

doi:10.1103/PhysRevLett.58.976

Color Magnetism and the Helicity Zero ( $\gamma$ (Neutrino) $N \to \Delta$ ) Transition Amplitude

M. Bourdeau
(
- Rensselaer Poly.
)
,
N.C. Mukhopadhyay
(
- Rensselaer Poly.
)

1987

4 pages

Published in:

Phys.Rev.Lett. 58 (1987) 976-979

DOI:

10.1103/PhysRevLett.58.976

View in:

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Abstract: (APS)

We compute longitudinal and scalar multipoles in the γvN→Δ transition in nonrelativistic quark shell models as a function of the virtual-photon mass squared. We show that the gauge relation between these multipoles for arbitrary virtual-photon mass squared is violated in the truncated quark–shell-model basis. The computed scalar multipole, insensitive to this truncation effect, should provide an accurate test of quark models. Existing experiments support the role of color-magnetic tensor force in hadronic structure.

PHOTON NUCLEON: INTERACTION
INTERACTION: PHOTON NUCLEON
DELTA(1232): PHOTOPRODUCTION
PHOTOPRODUCTION: DELTA(1232)
QUARK: NONRELATIVISTIC
shell model
AMPLITUDE ANALYSIS
QUARK: COLOR
HELICITY
HADRON SPECTROSCOPY

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