The E2 / M1 Transition Ratio for $\gamma N \to \Delta(1232)$ in a Modified Skyrme Model

Wirzba, A.; Weise, W.

doi:10.1016/0370-2693(87)90695-2

The E2 / M1 Transition Ratio for $\gamma N \to \Delta(1232)$ in a Modified Skyrme Model

A. Wirzba
(
- Nordita
)
,
W. Weise
(
- Regensburg U.
)

Nov 11, 1986

5 pages

Published in:

Phys.Lett.B 188 (1987) 6-10

Published: 1987

DOI:

10.1016/0370-2693(87)90695-2

Report number:

TPR-86-24

View in:

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Abstract: (Elsevier)

The electric quadrupole to magnetic dipole transition ratio E2/M1 for the reaction γN → Δ(1232) is calculated in a modified Skyrme model, which includes stabilizing fourth- and sixth-order terms. The coefficients of these terms are determined from vector meson couplings in the static limit; the other parameters are given by their physical values. We obtain for E2/M1 a negative sign and a magnitude which is consistent with the empirical value.

PHOTON NUCLEON: CAPTURE
CAPTURE: PHOTON NUCLEON
DELTA(1232): PHOTOPRODUCTION
PHOTOPRODUCTION: DELTA(1232)
TRANSITION: MAGNETIC
TRANSITION: ELECTRIC
Skyrme model
FIELD EQUATIONS: SOLITON
NUMERICAL CALCULATIONS: INTERPRETATION OF EXPERIMENTS
PHOTON NUCLEON --> DELTA(1232)

References(25)

Figures(0)

[1]

Energy-independent multipole analysis of pi0, pi+ and pi- photoproduction in the first resonance region

W. Pfeil
(
- Bonn U.
)
,
D. Schwela
(
- Bonn U.
)

- Nucl.Phys.B 45 (1972) 379-396
•
DOI:
- 10.1016/0550-3213(72)90249-0

[1]

A Multipole Analysis of Pion Photoproduction in the First Resonance Region

Frits A. Berends
(
- Leiden U.
)
,
A. Donnachie
(
- Manchester U. and
- Daresbury
)

- Nucl.Phys.B 84 (1975) 342-361
•
DOI:
- 10.1016/0550-3213(75)90311-9

[2]

DYNAMICAL MODEL FOR PION PHOTOPRODUCTION IN THE DELTA REGION

H. Tanabe
(
- Tokyo U., Komaba
)
,
K. Ohta
(
- Tokyo U., Komaba
)

- Phys.Rev.C 31 (1985) 1876-1884,
- Phys. Rev. C31 ( 1985) 1876-1884
•
DOI:
- 10.1103/PhysRevC.31.1876

[2]

Are hadrons deformed? An examination of the E2 to M1 amplitude ratio in N↔Δ transition

R. Davidson
(
- Rensselaer Poly.
)
,
N.C. Mukhopadhyay
(
- Rensselaer Poly.
)
,
R. Wittman
(
- Rensselaer Poly.
)

- AIP Conf.Proc. 133 (1985) 384-385
•
DOI:
- 10.1063/1.35416

[3]

Unitarity Constraint on the Ratio of Electric Quadrupole to Magnetic Dipole Amplitudes in the Nucleon - $\Delta$ Transition

R. Davidson
(
- Rensselaer Poly.
)
,
Nimai C. Mukhopadhyay
(
- Rensselaer Poly.
)
,
R. Wittman
(
- Rensselaer Poly.
)

- Phys.Rev.Lett. 56 (1986) 804
•
DOI:
- 10.1103/PhysRevLett.56.804

[4]

A MODIFIED SKYRMION

A. Jackson
(
- SUNY, Stony Brook
)
,
A.D. Jackson
(
- SUNY, Stony Brook
)
,
A.S. Goldhaber
(
- SUNY, Stony Brook
)
,
G.E. Brown
(
- SUNY, Stony Brook
)
,
L.C. Castillejo
(
- University Coll. London
)

- Phys.Lett.B 154 (1985) 101-106
•
DOI:
- 10.1016/0370-2693(85)90566-0

[4]

The Breathing Mode of the Modified Skyrmion

Ulrich B. Kaulfuss
(
- Ruhr U., Bochum
)
,
Ulf G. Meissner
(
- Bern U. and
- Ruhr U., Bochum
)

- Phys.Lett.B 154 (1985) 193-196
•
DOI:
- 10.1016/0370-2693(85)90583-0

[5]

Nonabelian Anomaly and Vector Meson Decays

- Phys.Rev.D 30 (1984) 594
•
DOI:
- 10.1103/PhysRevD.30.594

[5]

Chiral Lagrangian of Pseudoscalars and Vectors

O. Kaymakcalan
(
- Syracuse U.
)
,
J. Schechter
(
- Syracuse U.
)

- Phys.Rev.D 31 (1985) 1109
•
DOI:
- 10.1103/PhysRevD.31.1109

[5]

Skyrmions in the Presence of Vector Mesons

U.G. Meissner
(
- Regensburg U.
)
,
I. Zahed
(
- SUNY, Stony Brook
)

- Phys.Rev.Lett. 56 (1986) 1035
•
DOI:
- 10.1103/PhysRevLett.56.1035

[6]

Is rho Meson a Dynamical Gauge Boson of Hidden Local Symmetry?

- Phys.Rev.Lett. 54 (1985) 1215,
- Phys. Rev. Lett. 54 ( 1985) 1215-1218 and Hiroshima Univ. - RRK 84-22 (84,REC.SEP.) 11p
•
DOI:
- 10.1103/PhysRevLett.54.1215

[6]

Stabilization of Skyrmions via $\rho$ Mesons

et al.

- Nucl.Phys.B 259 (1985) 721-729,
- Nucl. Phys. B259 (1985) 721-729 and Nagoya Univ. - DPNU-85-02 (85,REC.MAY) 19p
•
DOI:
- 10.1016/0550-3213(85)90010-0

[7]

Stabilization of Chiral Solitons via Vector Mesons

- Phys.Lett.B 137 (1984) 251-256
•
DOI:
- 10.1016/0370-2693(84)90239-9

[8]

Phenomenological Delineation of the Quark - Gluon Structure From Nucleon Electromagnetic Form-factors

- Nucl.Phys.A 454 (1986) 669-690
•
DOI:
- 10.1016/0375-9474(86)90112-0

[8]

Skyrmions With $\rho$ and $\omega$ Mesons as Dynamical Gauge Bosons

- Phys.Rev.Lett. 57 (1986) 1676,
- Phys. Rev. Lett. 57 ( 1986) 1676-1679 and Regensburg Univ. - TPR-86-12 (86,REC.MAY) 11p
•
DOI:
- 10.1103/PhysRevLett.57.1676