Spin-dependent short range interactions of free neutrons with matter may be searched for in various ways. This short note discusses pseudomagnetic precession of trapped ultracold neutrons in vicinity to bulk matter, which should be several orders of magnitude more sensitive than any other method proposed so far.
@article{arxiv.0810.3215,
title = {Constraining spin-dependent short range interactions using neutron spin precession close to a mirror},
author = {O. Zimmer},
journal= {arXiv preprint arXiv:0810.3215},
year = {2015}
}