Properties of Nucleon Resonances by means of a Genetic Algorithm
Nuclear Theory
2008-11-26 v2
Abstract
We 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 (1230) and (1700). The former can be easily isolated and thus has been studied in depth, while the latter is not as well known experimentally.
Keywords
Cite
@article{arxiv.0805.4178,
title = {Properties of Nucleon Resonances by means of a Genetic Algorithm},
author = {C. Fernandez-Ramirez and E. Moya de Guerra and A. Udias and J. M. Udias},
journal= {arXiv preprint arXiv:0805.4178},
year = {2008}
}
Comments
12 pages, 10 figures, 3 tables. Minor corrections