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In particle physics, lepton number (historically also called lepton charge) [1] is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction. [2]
Similarly, the muons and their neutrinos are assigned a muon number of +1 and the tau leptons are assigned a tau lepton number of +1. The Standard Model predicts that each of these three numbers should be conserved separately in a manner similar to the way baryon number is conserved. These numbers are collectively known as lepton family numbers ...
) and n s̅ represents the number of strange antiquarks (s). This quantum number was introduced by Murray Gell-Mann. This definition gives the strange quark a strangeness of −1 for the above-mentioned reason. Charm (C): Defined as C = n c − n c̅, where n c represents the number of charm quarks (c) and n c̅ represents the number of charm ...
Each type of nucleus is called a "nuclide", and each nuclide is defined by the specific number of each type of nucleon. "Isotopes" are nuclides which have the same number of protons but differing numbers of neutrons. Conversely, "isotones" are nuclides which have the same number of neutrons but differing numbers of protons.
In particle physics, the Pontecorvo–Maki–Nakagawa–Sakata matrix (PMNS matrix), Maki–Nakagawa–Sakata matrix (MNS matrix), lepton mixing matrix, or neutrino mixing matrix is a unitary [a] mixing matrix that contains information on the mismatch of quantum states of neutrinos when they propagate freely and when they take part in weak ...
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In physics, particularly in renormalization theory, an accidental symmetry is a symmetry which is present in an effective field theory because the operators in the Lagrangian that violate this symmetry are irrelevant operators. [1]
FOX 4 reports: It was a significant find, eighteen. LIBERTY, Mo. -- You hear stories from time to time about people finding hidden treasures after a trip to a thrift store. A Clay County woman ...