The strong force is the strongest of the four fundamental forces in nature. It's responsible for holding the nucleus of an atom together, binding protons and neutrons.

Particles that are not affected by the strong force are:

* Leptons: This family of particles includes electrons, muons, taus, and their associated neutrinos. Leptons do not participate in the strong interaction.

* Intermediate Vector Bosons: These are particles that mediate other fundamental forces like the weak force (W and Z bosons) and the electromagnetic force (photon). While they carry force, they do not experience the strong force themselves.

It's important to note that:

* Quarks: These are the fundamental particles that make up protons and neutrons. They experience the strong force and are bound together by gluons.

* Gluons: These are the force carriers of the strong force. They interact with quarks and themselves.

In summary, only particles that are made up of quarks (like protons and neutrons) or mediate the strong force (gluons) experience the strong force.