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Title: P_11 Resonance Extracted from pi-N Data and Its Stability

Abstract

We study the stability of resonance poles in {pi}N P{sub 11} partial wave, particularly the Roper resonance, by varying parameters significantly within the EBAC dynamical coupled-channels model, keeping a good fit to the empirical amplitude. We find that two Roper poles are stable against the variation. However, for higher energies, the number of poles can change depending on how the parameters are fitted within error bars. We also developed a model with a bare nucleon which forms the physical nucleon by being dressed by the meson-cloud. We still 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:
1038730
Report Number(s):
JLAB-THY-11-1386; DOE/OR/23177-1578; arXiv:1106.3599
TRN: US1201977
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Journal Name:
AIP Conf. Proc.
Additional Journal Information:
Journal Volume: 1432; Conference: NSTAR 11, 17-20 May 2011, Newport News, VA
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; N-1440 BARYONS; NUCLEONS; PARTIAL WAVES; RESONANCE; SCATTERING; STABILITY

Citation Formats

Nakamura, Satoshi. P_11 Resonance Extracted from pi-N Data and Its Stability. United States: N. p., 2012. Web. doi:10.1063/1.3701235.
Nakamura, Satoshi. P_11 Resonance Extracted from pi-N Data and Its Stability. United States. https://doi.org/10.1063/1.3701235
Nakamura, Satoshi. 2012. "P_11 Resonance Extracted from pi-N Data and Its Stability". United States. https://doi.org/10.1063/1.3701235. https://www.osti.gov/servlets/purl/1038730.
@article{osti_1038730,
title = {P_11 Resonance Extracted from pi-N Data and Its Stability},
author = {Nakamura, Satoshi},
abstractNote = {We study the stability of resonance poles in {pi}N P{sub 11} partial wave, particularly the Roper resonance, by varying parameters significantly within the EBAC dynamical coupled-channels model, keeping a good fit to the empirical amplitude. We find that two Roper poles are stable against the variation. However, for higher energies, the number of poles can change depending on how the parameters are fitted within error bars. We also developed a model with a bare nucleon which forms the physical nucleon by being dressed by the meson-cloud. We still find a good stability of the Roper poles.},
doi = {10.1063/1.3701235},
url = {https://www.osti.gov/biblio/1038730}, journal = {AIP Conf. Proc.},
number = ,
volume = 1432,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2012},
month = {Sun Apr 01 00:00:00 EDT 2012}
}

Conference:
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