Majorana fermion
A Majorana fermion(), also referred to as a Majorana particle, is a fermion that has the same properties as its antiparticle. Ettore Majorana, an Italian physicist, thought they would exist, in 1937.  Majorana disappeared in 1938, and the particles are named after him. As Majorana fermionns are thought to have the same properties as their antiparticles, they cannot have an electric charge. Today, atomic particles with an electric charge are called Dirac fermions. An example for Dirac fermions are electrons, and positrons; they have the same properties, but their electric charge is different.