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

Abstract

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.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1029987
Report Number(s):
JLAB-THY-10-1225; DOE/OR/23177-1751; arXiv:1008.0214
TRN: US1105923
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: INPC 2010, 4-9 July 2010, Vancouver, Canada
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; AMPLITUDES; BARYONS; N-1440 BARYONS; RESIDUES; RESONANCE; SCATTERING; STABILITY

Citation Formats

S. X. Nakamura, H. Kamano, T.-S. H. Lee, T. Sato. Extraction of P11 Resonance from pi-N Data and Its Stability. United States: N. p., 2011. Web. doi:10.1088/1742-6596/312/3/032016.
S. X. Nakamura, H. Kamano, T.-S. H. Lee, T. Sato. Extraction of P11 Resonance from pi-N Data and Its Stability. United States. https://doi.org/10.1088/1742-6596/312/3/032016
S. X. Nakamura, H. Kamano, T.-S. H. Lee, T. Sato. 2011. "Extraction of P11 Resonance from pi-N Data and Its Stability". United States. https://doi.org/10.1088/1742-6596/312/3/032016.
@article{osti_1029987,
title = {Extraction of P11 Resonance from pi-N Data and Its Stability},
author = {S. X. Nakamura, H. Kamano, T.-S. H. Lee, T. Sato},
abstractNote = {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.},
doi = {10.1088/1742-6596/312/3/032016},
url = {https://www.osti.gov/biblio/1029987}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2011},
month = {Thu Sep 01 00:00:00 EDT 2011}
}

Conference:
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