%0 Journal Article
%T Constraints on a possible dineutron state from pionless EFT
%A H. W. Hammer
%A Sebastian K£¿nig
%J Physics
%D 2014
%I arXiv
%R 10.1016/j.physletb.2014.07.015
%X We investigate the sensitivity of the three-nucleon system to changes in the neutron-neutron scattering length to next-to-leading order in the pionless effective field theory, focusing on the the triton-3He binding energy difference and neutron-deuteron elastic scattering. Due to the appearance of an electromagnetic three-body counterterm at this order, the triton-3He binding energy difference remains consistent with the experimental value even for large positive neutron-neutron scattering lengths while the elastic neutron-deuteron scattering phase shifts are insensitive. We conclude that a bound dineutron cannot be excluded to next-to-leading order in pionless EFT.
%U http://arxiv.org/abs/1406.1359v1