Extraction of P11 Resonance from pi-N Data and Its Stability - INSPIRE

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Extraction of P11 Resonance from pi-N Data and Its Stability

S.X. Nakamura
(
- Jefferson Lab
)
,
H. Kamano
(
- Jefferson Lab
)
,
T.-S.H. Lee
(
- Jefferson Lab and
- Argonne
)
,
T. Sato
(
- Jefferson Lab and
- Osaka U.
)

Aug, 2010

6 pages

Part of Nuclear physics. Proceedings, 25th International Conference, INPC 2010, Vancouver, Canada, July 4-9, 2010

Published in:

J.Phys.Conf.Ser. 312 (2011) 032016

Contribution to:

24th International Nuclear Physics Conference (INPC 2010)

e-Print:

1008.0214 [nucl-th]

DOI:

10.1088/1742-6596/312/3/032016

Report number:

JLAB-THY-10-1225

View in:

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Abstract: (arXiv)

An important question about resonance extraction is how much resonance poles and residues extracted from data depend on a model used for the extraction, and on the precision of data. We address this question with the dynamical coupled-channel (DCC) model developed in Excited Baryon Analysis Center (EBAC) at JLab. We focus on the P11 pi-N scattering. We examine the model-dependence of the poles by varying parameters to a large extent within the EBAC-DCC model. We find that two poles associated with the Roper resonance are fairly stable against the variation. We also develop a model with a bare nucleon, thereby examining the stability of the Roper poles against different analytic structure of the P11 amplitude below pi-N threshold. We again find a good stability of the Roper poles.

Note:

6 pages, 8 figures, Contribution to the proceedings of 24th International Nuclear Physics Conference (INPC), Vancouver, Canada, 4-9 July 2010

References(11)

Figures(9)

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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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,
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)
,
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(
- Jefferson Lab
)
,
T.-S.H. Lee
(
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- Argonne, PHY
)
,
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(
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)

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)
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)
,
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(
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)
,
T.-S.H. Lee
(
- Jefferson Lab and
- Argonne, PHY
)
,
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)
,
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(
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)

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N. Suzuki
(
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)
,
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)
,
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(
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- Argonne, PHY
)

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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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