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Publication Information
Title Baryon transition form factors at the pole
Abstract Electromagnetic resonance properties are uniquely defined at the pole and do not depend on the separation of the resonance from background or the decay channel. Photon-nucleon branching ratios are nowadays often quoted at the pole, and we generalize the considerations to the case of virtual photons. We derive and compare relations for nucleon to baryon transition form factors both for the Breit-Wigner and the pole positions. Using the MAID2007 and SAID SM08 partial wave analyses of pion electroproduction data, we compare the G_M , G_E , and G_C form factors for the Delta(1232) resonance excitation at the Breit-Wigner resonance and pole positions up to Q^2 = 5 GeV^2 . We also explore the E/M and S/M ratios as functions of Q^2 . For pole and residue extraction, we apply the Laurent + Pietarinen method.
Author(s) L. Tiator, Michael Doring, Ron Workman, M. Hadzimehmedovic, H. Osmanovic, R. Omerovic, J. Stahov, A. Svarc
Publication Date December 2016
Document Type Journal Article
Primary Institution George Washington University, Washington, DC
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP), DOE Grant DE-SC0014133, Deutsche Forschungsgemeinschaft (SFB 1044), NSF CAREER grant PHY-1452055, NSF PIF grant No. 14
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-16-2315 OSTI Number: 1341786
LANL Number: 1606.00371 [nucl-th] Other Number: DOE/OR/23177-3910
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physical Review C
Refereed Yes
Volume 94
Issue 06
Page(s) 065204
Attachments/Datasets/DOI Link
Document(s)
1606.00371.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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