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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]
Pair production often refers specifically to a photon creating an electron–positron pair near a nucleus. As energy must be conserved, for pair production to occur, the incoming energy of the photon must be above a threshold of at least the total rest mass energy of the two particles created.
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 ...
The number and momentum distribution of the gluons in the proton (gluon density) have been measured by two experiments, H1 and ZEUS, [23] in the years 1996–2007. The gluon contribution to the proton spin has been studied by the HERMES experiment at HERA. [ 24 ]
The electrically charged weak interaction is unique in a number of respects: It is the only interaction that can change the flavour of quarks and leptons (i.e., of changing one type of quark into another). [a] It is the only interaction that violates P, or parity symmetry. It is also the only one that violates charge–parity symmetry.
FOX 4 reports: It was a significant find, eighteen -- You hear stories from time to time about people finding hidden treasures after a trip to a thrift store. A Clay County woman never imagined it ...
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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 February 2025. American multinational home improvement supplies retailing company The Home Depot, Inc. A Home Depot in Onalaska, Wisconsin Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6, 1978 ; 47 years ...