. For calculation purposes, we set ℏω = 𝐸𝐸 + iΓ where Γ can be physically interpreted as an energy broadening (or dampening) of the magnetic excitations sampled at an energy transfer of E. The final neutron cross section is then derived summing over all combinations of 𝑔𝑔 αβ (𝜔𝜔). Note that in the low temperature 𝑇𝑇 → 0 limit, this reduces to the simplified expression,