There is interesting news from Switzerland as the LHCb experiment team has announced evidence of a violation of lepton universality, which would be the first experimental evidence of a difference in the interactions of different leptons.
Let me begin with a quick review of leptons and their properties. At the start of the twentieth century, it was discovered that electricity was carried by sub-atomic particles known as
electrons. In the following decades, it was proven that these electrons are...
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