11 de setembro de 2018 | Estruturas Nucleares e Reações, Publicações
M. S. Hussein, J. F. Babb, R. Higa
Acta Physica Polonica B 48, 1837 (2017)
10/08/2017
Abstract
We present a summary of our recent publication concerning the derivation of the extended Casimir–Polder (C–P) dispersive interaction between two neutrons. Dynamical polarizations of the neutrons, recently derived within Chiral Effective Theory, are used for the purpose. An account of the higher frequency/energy behavior of these entities related to the opening of one-pion production channel and the excitation of the Δ resonance are taken into consideration in our derivation of the C–P interaction. The neutron–neutron system in free space is treated in details so are the neutron–wall and the wall–neutron–wall systems. The case of tetraneutron (a 4-neutron system) in a resonant state is then briefly considered. The 4n C–P interaction is evaluated to assess its potential relevance to the ongoing debate concerning the nature of the tetraneutron.