![]() The tauon was discovered in high-energy particle collision experiments between 19 by Martin Perl with his colleagues at Stanford Linear Accelerator Center in California. The discovery of this particle was so surprising that Nobel laureate Isidor Isaac Rabi exclaimed: “Who ordered that?” ![]() The average sea level muon flux (or concentration) is about one muon per square centimetre per minute.Īmerican physicists Carl Anderson and Seth Neddermeyer were studying cosmic rays when they discovered the muon in 1936. Muons make up more than half of the cosmic radiation at sea level, the remainder being mostly electrons, positrons and photons. The “Compact” Muon Solenoid detector at the Large Hadron Collider at CERN. It can be created in cosmic rays at different heights above the earth. Muons have mass 207 times larger than electrons and a lifetime of 2.20 microseconds. Muons and tauons are heavier and highly unstable versions of the electron. It was the first particle of antimatter that was discovered. The electron’s antiparticle, the positron, is identical in mass but has a positive charge. It is the smallest charged particle we know of and is very stable. It is directly tied to the chemical properties of almost all atoms. Associated to each charged lepton, there are three distinct kinds of neutrinos:įor each of these leptons there is also an associated anti-particle, which has the same mass but opposite charge. The three electrically neutral leptons are the neutrinos (ν).
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