41. Leptons are particles of e ( charged leptons ) or 0 e ( neutrinos ).42. Leptons are particles of e ( charged leptons ) or 0 e ( neutrinos ). 43. Leptons also undergo radioactive decay, meaning that they are subject to the weak interaction.44. Previous lepton colliders have all used electrons, or their anti-particles, positrons. 45. The charges of leptons and quarks are determined by underlying symmetries of the standard model. 46. Together, leptons and quarks make up the atoms that form all of the material world. 47. The citation said that Perl and his colleagues discovered a particle known as the tau lepton . 48. Perl discovered the subatomic particle called the tau lepton and Reines another one called the neutrino. 49. No 1-lepton or 2-lepta coin had been issued since the late 1870s. 50. It is classified as a lepton .
