On the discrepancies in the low energy neutron-deuteron breakup

Abstract

In view of recent neutron-deuteron (nd) breakup data for neutron-neutron (nn) and neutron-proton (np) quasi-free-scattering (QFS) arrangements and the large discrepancy found between theoretical predictions and measured nn QFS cross sections, we analyze the sensitivity of the QFS cross sections to different partial wave components of the nucleon-nucleon (NN) interaction. We found that the QFS cross section is strongly dominated by the 1S0 and 3S1-3D1 contributions. Because the standard three-nucleon force (3NF) only weakly influence the QFS region, we conjecture, that it must be the nn 1S0 force component which is responsible for the discrepancy in the nn QFS peak. A stronger 1S0 nn force is required to bring theory and data into agreement. Such an increased strength of the nn interaction will, however, not help to explain the nd breakup symmetric-space-star (SST) discrepancy. Further experimental cross-checkings are required.

17 pages, 10 figures

References in corpus (4)

• Momentum-space description of three-nucleon breakup reactions including the Coulomb interaction
• Relativistic effects in neutron-deuteron elastic scattering
• Selectivity of the Nucleon Induced Deuteron Breakup and Relativistic Effects
• Relativistic effects in exclusive neutron-deuteron breakup

Cited by in corpus (10)

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• Low-energy neutron-deuteron reactions with N3LO chiral forces
• Calculations of three-nucleon reactions with N3LO chiral forces: achievements and challenges
• Dineutron and the three-nucleon continuum observables
• The nn quasi-free nd breakup cross section: discrepancies to theory and implications on the 1S0 nn force
• Exploring manifestation and nature of a dineutron in two-neutron emission using a dynamical dineutron model
• Three-nucleon system: Irreducible and reducible contributions of the three-nucleon force
• High-precision nuclear forces from chiral EFT: State-of-the-art, challenges and outlook
• Measurement of the ${}^1{S}_0$ neutron-neutron effective range in neutron-deuteron breakup
• Investigation of interaction of circularly and linearly polarized photon beams with polarized 3He target