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Baryon transition form factors at the pole

L. Tiator
(
- Mainz U., Inst. Kernphys.
)
,
M. Döring
(
- George Washington U. and
- Jefferson Lab
)
,
R.L. Workman
(
- George Washington U.
)
,
M. Hadžimehmedović
(
- Tuzla U.
)
,
H. Osmanović
(
- Tuzla U.
)

Jun 1, 2016

9 pages

Published in:

Phys.Rev.C 94 (2016) 6, 065204

Published: Dec 21, 2016

e-Print:

1606.00371 [nucl-th]

DOI:

10.1103/PhysRevC.94.065204

Report number:

JLAB-THY-16-2315

View in:

reference search18 citations

Citations per year

Abstract: (APS)

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 GM, GE, and GC form factors for the Δ(1232) resonance excitation at the Breit-Wigner resonance and pole positions up to Q2=5GeV2. We also explore the E/M and S/M ratios as functions of Q2. For pole and residue extraction, we apply the Laurent + Pietarinen method.

Note:

13 pages, 4 figures

13.60.Le
14.20.Gk
11.80.Et
form factor: transition
resonance: Breit-Wigner
pi: electroproduction
photon: virtual
pole
baryon
branching ratio

References(72)

Figures(21)

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L. Tiator
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N. Suzuki
(
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)
,
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(
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)
,
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(
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)

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•
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Alfred Svarc
(
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)
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(
- Tuzla U.
)
,
Hedim Osmanovic
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)
,
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(
- Tuzla U.
)

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)
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(
- Kyoto U., Yukawa Inst., Kyoto
)
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(
- Argonne, PHY
)
,
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(
- Osaka U.
)

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•
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(
- Bonn U., HISKP
)
,
M. Döring
(
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)
,
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(
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)
,
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(
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)
,
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(
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)

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D. Rönchen
(
- Julich, Forschungszentrum and
- JCHP, Julich
)
,
M. Döring
(
- Bonn U., HISKP and
- Bonn U. and
- George Washington U.
)
,
F. Huang
(
- Beijing, GUCAS and
- Georgia U.
)
,
H. Haberzettl
(
- George Washington U.
)
,
J. Haidenbauer
(
- Julich, Forschungszentrum and
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)

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•
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Vladimir Pascalutsa
(
- William-Mary Coll. and
- Jefferson Lab
)
,
Marc Vanderhaeghen
(
- William-Mary Coll. and
- Jefferson Lab
)

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•
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D. Jido
(
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)
,
M. Doering
(
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)
,
E. Oset
(
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M. Doring
(
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)

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•
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•
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[19]

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M. Doring
(
- JCHP, Julich
)
,
D. Jido
(
- Kyoto U., Yukawa Inst., Kyoto
)
,
E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)

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•
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•
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I.G. Aznauryan
(
- Jefferson Lab and
- Yerevan Phys. Inst.
)
,
V.D. Burkert
(
- Jefferson Lab
)

e-Print:
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[21]

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G. Ramalho
(
- IIP, Brazil
)
,
M. T Pena
(
- Lisbon, CFTP and
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)
,
J. Weil
(
- Frankfurt U., FIAS
)
,
H. van Hees
(
- Frankfurt U. and
- Frankfurt U., FIAS
)
,
U. Mosel
(
- Giessen U.
)

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•
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- 1512.03764
•
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I.G. Aznauryan
(
- Jefferson Lab and
- Yerevan Phys. Inst.
)
,
V.D. Burkert
(
- Jefferson Lab
)

- Phys.Rev.C 92 (2015) 3, 035211
•
e-Print:
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•
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[23]

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•
e-Print:
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•
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[24]

Elastic and Transition Form Factors of the $\Delta(1232)$

Jorge Segovia
(
- Argonne
)
,
Chen Chen
(
- Hefei, CUST
)
,
Ian C. Cloët
(
- Argonne
)
,
Craig D. Roberts
(
- Argonne
)
,
Sebastian M. Schmidt
(
- IAS, Julich and
- JARA, Aachen
)

et al.

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•
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•
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