Dynamics of liquid hydrogen: the realm of neutron scattering

A still open problem in the diffusive dynamics of fluids is the validity of the Gaussian approximation to the self dynamic structure factor. In particular, this issue is of high impact in the case of liquid hydrogen, for its importance in fundamental physics, its technological applications, and its role in the development of quantum simulation methods. A neutron investigation carried out on BRISP and IN4 sheds new light on this long-standing problem.