He is an English theoretical physicist who proposed a mechanism that would endow particles with mass even though they appeared originally in a theory and probably in the Universe!- with no mass at all. The idea is that all the particles acquire with an all-pervading field called the Higgs field. This is carried by the Higgs Boson and it is the most important part of the standard model of particles and forces because it explains the masses of the carriers of the weak force. These particles are responsible for beta decay and for nuclear reactions that fuel the Sun. It has not been detected yet because it exceeds the capacity of any current accelerator.