Building experimental evidence suggests that the electron, muon and tau may feel different forces. When the tau lepton was discovered in the 1970s, it didn’t resolve any outstanding mysteries—it ...

Above: Tania Entwistle's team of students from Ward Melville High School in New York. Front from left: Stephen Bohlman, Sammi Qin. Back from left: Ram Gupta, Lucas Janson, Ari Richman, Josh Steinberg.

Unlike their stable lepton cousin, the electron, tau leptons and muons are highly unstable and quickly decay within a fraction of a second. According to a Standard Model concept called "lepton ...

Subatomic particles have been found that appear to defy the Standard Model of particle physics. The team working at Cern's Large Hadron Collider have found evidence of leptons decaying at different ...

Elisabetta Barberio receives funding from the ARC. So what are leptons? First, let’s start with the basics. Matter is made up of atoms, and atoms are made of electrons and nuclei, bound by the ...