Laxism

Laxism is an artificial force that is carried by laxon particles. This force can be used to create prime matter, i.e matter composed of quarks and leptons lighter than those of first generation matter.

This matter is identical to first generation matter in most ways, but had far less mass. Due to this, objects could be built from prime matter that were far lighter than those built from regular matter. Prime matter, like high-generation matter, required Equilism to be stable.

Function
The interaction between laxons and first generation particles forces the latter to release a Weak Force boson (either a W or Z boson), and transform into a prime generation particle.

Prime generations make up prime generation matter, which is lighter than normal matter despite having identical properties otherwise. Prime matter can be used to create ultra light objects.

Further bombardment of prime matter causes it to loose even more mass, becoming double-prime, triple-prime, quadruple prime and so on. A car weighing 1000 kg weighs 38 grams (as much as a hamster) when made of quadruple-prime matter.

Fractional laxism
Fractional laxism is an exceptionally exotic phenomenon that involves the use of fractional laxons (1/2, 1/4, 1/8, 1/16 etc laxons). Such laxons can interact with quarks or leptons to produce a lower energy photon and a fractional W or Z boson, and creating a quark/lepton with an intermediate mass between generations.