%0 Journal Article
%T A First Experimental Limit on In-matter Torsion from Neutron Spin Rotation in Liquid He-4
%A Ralf Lehnert
%A H. Yan
%A W. M. Snow
%J Physics
%D 2013
%I arXiv
%R 10.1016/j.physletb.2014.01.063
%X We report the first experimental upper bound to our knowledge on possible in-matter torsion interactions of the neutron from a recent search for parity violation in neutron spin rotation in liquid He-4. Our experiment constrains a coefficient $\zeta$ consisting of a linear combination of parameters involving the time components of the torsion fields $T^\mu$ and $A^\mu$ from the nucleons and electrons in helium which violates parity. We report an upper bound of $|\zeta|<9.1x10^{-23}$ GeV at 68% confidence level and indicate other physical processes that could be analyzed to constrain in-matter torsion.
%U http://arxiv.org/abs/1311.0467v3