Extraction of P{sub 11} resonances from piN data

Kamano, H; Nakamura, S X; Lee, T.-S. H.; Sato, T

doi:10.1103/PHYSREVC.81.065207

Title: Extraction of P{sub 11} resonances from piN data

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.065207· OSTI ID:21388637

Kamano, H; Nakamura, S X ^[1]; Lee, T.-S. H. ^[1]; Sato, T ^[1]

Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)

We show that two P{sub 11} nucleon resonance poles near the piDELTA threshold, obtained in several analyses, are stable against large variations of parameters within a dynamical coupled-channels analysis based on meson-exchange mechanisms. By also performing an analysis based on a model with a bare nucleon state, we find that this two-pole structure is insensitive to the analytic structure of the amplitude in the region below the piN threshold. Our results are M{sub pole}=(1363{sub -6}{sup +9}-i79{sub -5}{sup +3}) and (1373{sub -10}{sup +12}-i114{sub -9}{sup +14}) MeV. We also demonstrate that the number of poles in the 1.5-GeV <=W<= 2-GeV region could be more than one, depending on how the structure of the single-energy solution of SAID is fitted. For three-pole solutions, our best estimated result of a pole near N(1710) listed by Particle Data Group is (1829{sub -65}{sup +131}-i192{sub -110}{sup +88}) MeV, which is close to the results of several previous analyses. Our results indicate the need for more accurate piN reaction data in the W> 1.6-GeV region for high-precision resonance extractions.

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OSTI ID:: 21388637

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevC.81.065207; (c) 2010 The American Physical Society; ISSN 0556-2813

Country of Publication:: United States

Language:: English

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Nucleon resonances within a dynamical coupled-channels model of $π N$ and $γ N$ reactions Kamano, H.; Nakamura, S. X.; Lee, T. -S. H. Physical Review C, Vol. 88, Issue 3 https://doi.org/10.1103/physrevc.88.035209	journal	September 2013
Pion-exchange and Fermi-motion effects on the proton-deuteron Drell-Yan process Kamano, H.; Lee, T. -S. H. Physical Review D, Vol. 86, Issue 9 https://doi.org/10.1103/physrevd.86.094037	journal	November 2012
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Nucleon-to-Roper electromagnetic transition form factors at large $Q^{2}$ Chen, Chen; Lu, Ya; Binosi, Daniele Physical Review D, Vol. 99, Issue 3 https://doi.org/10.1103/physrevd.99.034013	journal	February 2019
Colloquium : Roper resonance: Toward a solution to the fifty year puzzle Burkert, Volker D.; Roberts, Craig D. Reviews of Modern Physics, Vol. 91, Issue 1 https://doi.org/10.1103/revmodphys.91.011003	journal	March 2019
Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction Aznauryan, I. G.; Bashir, A.; Braun, V. M. International Journal of Modern Physics E, Vol. 22, Issue 06 https://doi.org/10.1142/s0218301313300154	journal	June 2013
Structure of the Roper Resonance from Lattice QCD Constraints Wu, Jia-jun; Leinweber, Derek B.; Liu, Zhan-wei arXiv https://doi.org/10.48550/arxiv.1703.10715	text	January 2017

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Title: Extraction of P{sub 11} resonances from piN data

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