Testing this theory goes back to the original notion of particle jelly ripples and in particular, the Higgs jelly which a) can ripple and b) would resemble a particle in an experiment: the infamous Higgs-Boson. So how do scientists detect this ripple using the LHC?
To monitor the collisions and the resulting post-collisions, scientists set up detectors which act like three-dimensional digital cameras which measure the tracks of particles coming from the collisions. Properties from these tracks - that is, how much they curve in magnetic fields - are used to infer various properties of the particles that generated them; one extremely common property that can be measured is an electric charge where it is believed the Higgs exists somewhere between 120 and 125 giga-electronvolts. Meaning, if the detectors find an event with an electric charge that exists between these two ranges, this would indicate a new particle which may be indicative of the Higgs-Boson.