In other models the Higgs scalar is a composite particle.

Typically, science considers these composite particles matter because they have both rest mass and volume.

This is not true for a composite particle, which can never be represented as a superposition of exactly-localized quantum states.

However it is possible that some of these might turn up to be composite particles after all, and merely appear to be elementary for the moment.

Due to this force, quarks are confined within composite particles called hadrons.

Deuteron, the only known stable composite particle that consist of six quarks.

Baryons are composite particles which are made of three quarks.

Also, composite particles can have spins different from the particles which comprise them.

They have not been found to be composite particles even though experiments that should yield this result have been done.

It also includes the discovery of composite particles and antiparticles that were of particular historical importance.