Nucleon momentum distributions in $^3$He and three-body interactions
Abstract
We calculate momentum distributions of neutrons and protons in He in the framework of a model which includes 3N interactions together with 2N interactions. It is shown that contribution of 3N interactions becomes essential in comparison with contribution coming from 2N interaction for internal momentum in He ~250~MeV/c. We also compare calculated momentum distribution of protons with so-called empirical momentum distribution of protons extracted from A breakup cross-sections measured for protons emitted at zero degree. It is concluded that 3N interactions cannot completely explain the disagreement between the available data on the empirical momentum distribution of protons in and calculations based on 2N interaction, which is observed at high momentum region of the momentum distribution, ~250~MeV/c.
Keywords
Cite
@article{arxiv.1704.07662,
title = {Nucleon momentum distributions in $^3$He and three-body interactions},
author = {S. V. Bekh and A. P. Kobushkin and E. A. Strokovsky},
journal= {arXiv preprint arXiv:1704.07662},
year = {2017}
}
Comments
Published version. Updated introduction, figure 4 is changed, some typos are corrected