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lepton |
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v] are the total energies of emitted leptons, and A and B are the usual decay asymmetry parameters arising from parity violation for the charged lepton and the neutrino, respectively. For instance, anthropologists have found evidence of hominids as far back as 6 million years ago; we now know that matter is made up of quarks and leptons and is governed by just a few fundamental forces; all biological information is encoded in the helical strands of our DNA. The standard model identifies a dozen fundamental fermions, or matter particles, which come in two families known as quarks and leptons. |
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