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arXiv 1301.6151nucl-th
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Skyrme能量密度-泛函模型中不确定性的传播

Propagation of uncertainties in the Skyrme energy-density-functional model

Y. Gao, J. Dobaczewski, M. Kortelainen, J. Toivanen, D. Tarpanov

摘要:

核能密度泛函(EDF)的参数通常是通过对实验数据的优化来获得的。对于适当定义的罚函数的最小值,统计灵敏度分析提供了EDF参数的不确定性。为了量化模型给出的观测量的理论误差,我们研究了UNEDF 0 Skyrme-EDF方法中不确定性的传播。我们发现,通常的标准误差迅速增加向富中子核。这可能与目前使用的EDF的等矢量耦合常数的大的不确定性有关。

英文摘要:

Parameters of nuclear energy-density-functionals (EDFs) are always derived by an optimization to experimental data. For the minima of appropriately defined penalty functions, a statistical sensitivity analysis provides the uncertainties of the EDF parameters. To quantify theoretical errors of observables given by the model, we studied the propagation of uncertainties within the UNEDF0 Skyrme-EDF approach. We found that typically the standard errors rapidly increase towards neutron rich nuclei. This can be linked to large uncertainties of the isovector coupling constants of the currently used EDFs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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