Benchmark calculation of p-3H and n-3He scattering

TL;DR

This paper provides a benchmark calculation of p-3H and n-3He scattering using three different methods, comparing results and experimental data to validate the approaches in the energy range above the n-3He threshold.

Contribution

It introduces a comprehensive benchmark study of four-nucleon scattering calculations employing three distinct computational methods for the first time.

Findings

Good agreement among the three methods validates their reliability.

Results serve as a benchmark for future theoretical studies.

Comparison with experimental data highlights areas of agreement and discrepancy.

Abstract

p-3H and n-3He scattering in the energy range above the n-3He but below the d-d thresholds is studied by solving the 4-nucleon problem with a realistic nucleon-nucleon interaction. Three different methods -- Alt, Grassberger and Sandhas, Hyperspherical Harmonics, and Faddeev-Yakubovsky -- have been employed and their results for both elastic and charge-exchange processes are compared. We observe a good agreement between the three different methods, thus the obtained results may serve as a benchmark. A comparison with the available experimental data is also reported and discussed.