Almost all matter we can see and touch is made up of the protons and neutrons. But what are protons and neutrons composed of? The simple answer is quarks, of which there are six distinct kinds, held together by gluons.
The ‘strong force’ carried by gluons is about 100 times stronger than electromagnetism, which governs the interactions of atoms. It’s a major focus of the ARC Special Research Centre for the Subatomic Structure of Matter (CSSM).
Established 20 years ago at the University of Adelaide, the Centre is at the international forefront of investigating the ramifications of quantum chromodynamics (QCD), the theory which describes the strong force interactions that are fundamental to how our world works.