Halo effective field theory analysis of one-neutron knockout reactions of $^{11}\rm Be$ and $^{15}\rm C$

TL;DR

This paper demonstrates that Halo Effective Field Theory (Halo-EFT) provides a reliable and accurate framework for analyzing one-neutron knockout reactions of halo nuclei, confirming consistency with nuclear structure models and experimental data.

Contribution

The study applies Halo-EFT within an eikonal reaction model to analyze knockout reactions, showing its effectiveness in describing halo nuclei and validating nuclear structure predictions.

Findings

Excellent agreement with experimental knockout data.

Asymptotic normalization coefficients match ab initio calculations.

Halo-EFT reliably models halo nuclei reactions.

Abstract

Background: One-nucleon knockout reactions provide insightful information on the single-particle structure of nuclei. When applied to one-neutron halo nuclei, they are purely peripheral, suggesting that they could be properly modeled by describing the projectile within a Halo Effective Field Theory (Halo-EFT). Purpose: We reanalyze the one-neutron knockout measurements of $^{11}$Be and $^{15}$C-both one-neutron halo nuclei-on beryllium at about 60MeV/nucleon. We consider Halo-EFT descriptions of these nuclei which already provide excellent agreement with breakup and transfer data. Method: We include a Halo-EFT description of the projectile within an eikonal-based model of the reaction and compare its outcome to existing data. Results: Excellent agreement with experiment is found for both nuclei. The asymptotic normalization coefficients inferred from this comparison confirm predictions from \emph{ab initio} nuclear-structure calculations and values deduced from transfer data. Conclusions: Halo-EFT can be reliably used to analyze one-neutron knockout reactions measured for halo nuclei and test predictions from state-of-the-art nuclear structure models on these experimental data.