P_11 Resonance Extracted from pi-N Data and Its Stability

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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.

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301-304

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Nakamura, Satoshi April 1, 2012.

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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.

Physical Description

301-304

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  • Journal Name: AIP Conf. Proc.; Journal Volume: 1432; Conference: NSTAR 11, 17-20 May 2011, Newport News, VA

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  • Report No.: JLAB-THY-11-1386
  • Report No.: DOE/OR/23177-1578
  • Report No.: arXiv:1106.3599
  • Grant Number: AC05-06OR23177
  • DOI: 10.1063/1.3701235 | External Link
  • Office of Scientific & Technical Information Report Number: 1038730
  • Archival Resource Key: ark:/67531/metadc831068

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  • April 1, 2012

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 4:14 p.m.

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Nakamura, Satoshi. P_11 Resonance Extracted from pi-N Data and Its Stability, article, April 1, 2012; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc831068/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.