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Gómez Nicola, Ángel and Nieves, J. and Peláez Sagredo, José Ramón and Ruiz Arriola, E. (2000) Improved unitarized Heavy Baryon Chiral Perturbation Theory for π N scattering. Physics letters B, 486 (1-feb). pp. 77-85. ISSN 0370-2693
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Official URL: http://dx.doi.org/10.1016/S0370-2693(00)00761-9
Abstract
We show how the unitarized description of pion nucleon scattering within Heavy Baryon Chiral Perturbation Theory can be considerably improved, by a suitable reordering of the expansion over the nucleon mass. Within this framework, the ∆ resonance and its associated pole can be recovered from the chiral parameters obtained from low-energy determinations. In addition, we can obtain a good description of the six S and P wave phase shifts in terms of chiral parameters with a natural size and compatible with the Resonance Saturation Hypothesis.
Item Type: | Article |
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Additional Information: | © 2000 Elsevier Science B.V. All rights reserved. |
Uncontrolled Keywords: | Nucleon scattering; Elastic-scattering; Meson interactions; One-loop; Approximation; Amplitude; Model |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 30673 |
Deposited On: | 05 Jun 2015 09:37 |
Last Modified: | 10 Dec 2018 15:10 |
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