Isospin decomposition of $\gamma N \to N^*$ transitions within a dynamical coupled-channels model - INSPIRE

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Isospin decomposition of $\gamma N \to N^*$ transitions within a dynamical coupled-channels model

H. Kamano
(
- KEK, Tsukuba and
- J-PARC
)
,
S.X. Nakamura
(
- Osaka U.
)
,
T.S.H. Lee
(
- Argonne, PHY
)
,
T. Sato
(
- Osaka U.
)

May 2, 2016

14 pages

Published in:

Phys.Rev.C 94 (2016) 1, 015201

Published: Jul 7, 2016

e-Print:

1605.00363 [nucl-th]

DOI:

10.1103/PhysRevC.94.015201

Report number:

KEK-TH-1902,
J-PARC-TH-0051

View in:

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Abstract: (APS)

By extending the dynamical coupled-channels analysis performed in our previous work [Phys. Rev. C 88, 035209 (2013)]PRVCAN0556-281310.1103/PhysRevC.88.035209 to include the available data of photoproduction of π mesons off neutrons, the transition amplitudes for the photoexcitation of the neutron-to-nucleon resonances, γn→N*, at the resonance pole positions are determined. The combined fits to the data for both the proton- and neutron-target reactions also revise our results for the resonance pole positions and the γp→N* transition amplitudes. Our results allow an isospin decomposition of the γN→N* transition amplitudes for the isospin I=12N* resonances, which is necessary for testing hadron structure models and gives crucial inputs for constructing models of neutrino-induced reactions in the nucleon resonance region.

Note:

20 pages, 12 figures. Typos, equations, and numerical values in Tables are corrected

resonance: pole
model: coupled channel
pi: photoproduction
nucleon resonance
isospin
structure
hadron
meson

References(50)

Figures(15)

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