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Title

Properties of nucleon resonances by means of a genetic algorithm

AuthorsFernández-Ramírez, César ; Moya de Guerra, Elvira ; Udías, A.; Udías, J. M.
Issue Date24-Jun-2008
PublisherAmerican Physical Society
CitationPhysical Review C - Nuclear Physics 77: 065212 (2008)
AbstractWe present an optimization scheme that employs a genetic algorithm (GA) to determine the properties of low-lying nucleon excitations within a realistic photo-pion production model based upon an effective Lagrangian. We show that with this modern optimization technique it is possible to reliably assess the parameters of the resonances and the associated error bars as well as to identify weaknesses in the models. To illustrate the problems the optimization process may encounter, we provide results obtained for the nucleon resonances Δ(1230) and Δ(1700). The former can be easily isolated and thus has been studied in depth, while the latter is not as well known experimentally. © 2008 The American Physical Society.
Description11 págs.; 10 figs.; 3 tabs. ; PACS number(s): 14.20.Gk, 13.60.Le, 02.60.Pn, 02.70.−c
Publisher version (URL)https://doi.org/10.1103/PhysRevC.77.065212
URIhttp://hdl.handle.net/10261/142777
DOI10.1103/PhysRevC.77.065212
Identifiersdoi: 10.1103/PhysRevC.77.065212
issn: 0556-2813
Appears in Collections:(CFMAC-IEM) Artículos
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