| 41. | Leptons are particles of e ( charged leptons ) or 0 e ( neutrinos ).
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| 42. | Leptons are particles of e ( charged leptons ) or 0 e ( neutrinos ).
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| 43. | Leptons also undergo radioactive decay, meaning that they are subject to the weak interaction.
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| 44. | Previous lepton colliders have all used electrons, or their anti-particles, positrons.
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| 45. | The charges of leptons and quarks are determined by underlying symmetries of the standard model.
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| 46. | Together, leptons and quarks make up the atoms that form all of the material world.
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| 47. | The citation said that Perl and his colleagues discovered a particle known as the tau lepton.
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| 48. | Perl discovered the subatomic particle called the tau lepton and Reines another one called the neutrino.
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| 49. | No 1-lepton or 2-lepta coin had been issued since the late 1870s.
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| 50. | It is classified as a lepton.
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