Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/11111
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Type: | Journal article |
Title: | Nucleon mass and pion loops |
Author: | Hecht, M. Roberts, C. Oettel, M. Thomas, A. Schmidt, S. Tandy, P. |
Citation: | Physical Review C: Nuclear Physics, 2002; 65(5):1-17 |
Publisher: | American Physical Soc |
Issue Date: | 2002 |
ISSN: | 0556-2813 1089-490X |
Statement of Responsibility: | M. B. Hecht, C. D. Roberts, M. Oettel, A. W. Thomas, S. M. Schmidt, P. C. Tandy |
Abstract: | Poincaré covariant Faddeev equations for the nucleon and Δ are solved to illustrate that an internally consistent description in terms of confined-quark and non-point-like confined-diquark correlations can be obtained. πN-loop induced self-energy corrections to the nucleon’s mass are analyzed and shown to be independent of whether a pseudoscalar or pseudovector coupling is used. Phenomenological constraints suggest that this self-energy correction reduces the nucleon’s mass by up to several hundred MeV. That effect does not qualitatively alter the picture, suggested by the Faddeev equation, that baryons are quark-diquark composites. However, neglecting the π loops leads to a quantitative overestimate of the nucleon’s axial-vector diquark component. |
Rights: | ©2002 American Physical Society |
DOI: | 10.1103/PhysRevC.65.055204 |
Published version: | http://dx.doi.org/10.1103/physrevc.65.055204 |
Appears in Collections: | Aurora harvest 7 Special Research Centre for the Subatomic Structure of Matter publications |
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hdl_11111.pdf | Published version | 294.23 kB | Adobe PDF | View/Open |
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