Leptons, Fermions and Bosons


The standard model of particle physics

Posted by Phisyks on 20 Oct 2015

Leptons, Fermions and Bosons

Elementary particles in an atom as we know are Electrons, Protons and Neutrons. Each have certain characteristic properties which include Mass, Charge, Spin, Energy etc.

Elementary particles are still unseen and we only see their properties by their behavior and results they produce during experiments. But is that all? Are these the smallest of everything in this universe?

Maybe not. Each of the particles are made up of even smaller set of particles called quarks. There are 6 varieties of quarks and they too have many characteristic properties. One important similarity between the quarks and those bigger elementary particles is that they obey the Pauli Exclusion Principle.

A table of elementary particles which is also known as the standard model is given below:

The ones in red are quarks. The one in green are called leptons. These are particles having half integer spin. And the ones in black are called gauge boson which are the cause of forces like Electrostatic and etc. in particles.