Statistical Error analysis of Nucleon-Nucleon phenomenological potentials

Abstract

Nucleon-Nucleon potentials are commonplace in nuclear physics and are determined from a finite number of experimental data with limited precision sampling the scattering process. We study the statistical assumptions implicit in the standard least squares fitting procedure and apply, along with more conventional tests, a tail sensitive quantile-quantile test as a simple and confident tool to verify the normality of residuals. We show that the fulfilment of normality tests is linked to a judicious and consistent selection of a nucleon-nucleon database. These considerations prove crucial to a proper statistical error analysis and uncertainty propagation. We illustrate these issues by analyzing about 8000 proton-proton and neutron-proton scattering published data. This enables the construction of potentials meeting all statistical requirements necessary for statistical uncertainty estimates in nuclear structure calculations.

20 pages. 13 figures. 10 tables, (minor numerical changes) Physical Review C (to appear)

References in corpus (2)

• Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
• Error analysis of nuclear mass fits

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• Implicit and explicit renormalization: two complementary views of effective interactions
• Covariance analysis of finite temperature density functional theory: symmetric nuclear matter