New estimation for neutron-neutron scattering length: charge symmetry and charge independence breaking revisited

2017/03/01 by E. S. Konobeevski, Konobeevski, E. S., S. V. Zuyev +5
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.48550/arxiv.1703.00519

openalex publication_date 2017/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Recent experimental results for neutron-neutron scattering length are reanalyzed from the point of view of three-nucleon force contribution. We found that the limiting value of a_nn=- 15.8± 0.5~fm must be free of any implicit three-body force contribution. We have also shown that the difference between the above experimental value of a_nn and the well established value of neutron-proton scattering length a_np can be explained by differences in the one-pion exchange potentials.

Related

• Zero-energy neutron-triton and proton-Helium-3 scattering with \eftnopi
• Study of the Low-Energy Characteristics of Neutron-Neutron Scattering in the Effective-Range Approximation
• Neutron size from high energy scattering data
• Constraints on the Lambda-neutron interaction from charge-symmetry breaking of A=4 hypernuclei
• The n-th order Moment of the Nuclear Charge Density and Contribution from the Neutrons