6/4/2023 0 Comments Lepton subatomic particle![]() ![]() Classification in the Standard Modelįig 2: Leptons classified under the Standard model source: Facebook It has properties similar to the electron but is much heavier than the electron and the muon. Tau was discovered by Martin Lewis Perl and his colleagues in 1974. The new track came from something like an electron but more than 200 times its mass. They noticed tracks that could not be explained using ordinary particles. Neddermeyer were studying cosmic radiation in a cloud chamber (a device used for seeing tracks of ionized radiation). The muon (pronounced as “myoo-awn” and denoted by the symbol □) was discovered in1936 when two American physicists, Carl Anderson and S.H. Let us see how the other family members came about. So that’s about how electrons were discovered. Thompson and his team of British Physicists in 1897 which confirmed the existence of the first subatomic particle, the electron. ![]() Then came the famous cathode ray experiment performed by J.J. This was certainly a Eureka! moment for future philosophers and scientists. In his 1600 treatise De Magnete, the English scientist William Gilbert coined the New Latin term electrica, to refer to those substances with property similar to that of amber which attract small objects after being rubbed. Along with lightning, this phenomenon is one of humanity’s earliest recorded experiences with electricity. The ancient Greeks noticed that amber attracted small objects when rubbed with fur. Who else could it be? And if you thought we have had enough of ancient Greeks in our history books, please accept my Apollo-gies. However the thought of a charged particle smaller than the atom came long before J.J. In the search for the tiniest particle, scientists came across electrons which was the first lepton to be discovered. This helps scientists in figuring out which state the neutrino was in before it interacted with its partner particle and thus they are named according to the partner particle associated with the neutrino. What makes it even more puzzling is the fact that the type of neutrino is determined by the particle it interacts with. These flavors of neutrinos are quite peculiar in nature as any one neutrino can exist as a mixture of all the three types of states. electron type neutrino, a muon type neutrino and a tau type neutrino. Each type of neutrino corresponds to one of the remaining leptons i.e. There are three types of neutrinos and are denoted by the symbol □. They are denoted by the symbol ‘e’, next are the muons and tau in line, evident from the symbols they carry. ![]() The first class of leptons are our very famous electrons. Before that, let’s take a look at the figure and uncover the names of the leptons. In this article, we will discuss the six types of leptons present till date in the standard model. Leptons are a family of elementary subatomic particles which respond to 3 out of 4 fundamental forces of nature, namely the electromagnetic force, weak force and gravitational force and are not affected by the strong nuclear force. ![]()
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