Some Properties of the Salam-Weinberg Theory of Leptons
One major success of the standard model is the accurate prediction of the masses of the intermediate bosons, starting from the operator structure of the neutral current. This made a specific experimental search for these particles possible, to which end it is important to know the possible creation and decay mechanisms. We see immediately that in an electron-positron storage ring it is considerably easier to produce the neutral Z° bosons than the charged W± bosons. In the case of Z0, simple pair annihilation suffices (Fig. 5.1a), whereas charged bosons can only be produced in higher-order processes (for example, Fig. 5.1b and 5.2). In particular, decays involving a neutrino are experimentally characteristic, because a large fraction of the energy present in the scattering is transferred to the neutrino and is therefore not seen in the detectors.
KeywordsTotal Cross Section Differential Cross Section Vector Boson Storage Ring Scatter Cross Section
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- BHABHA, Homi Jehangir, physicist, *30.10.1909 in Bombay (India), †24.1.1966. He received his Ph.D. in Cambridge in 1932, then became professor in Bangalore and, since 1945, director of the Tata Institute in Bombay. Bhabha made many contributions to the physics of cosmic rays, where he together with Heitler developed the theory of particle cascades.Google Scholar
- GLASHOW, Sheldon, theoretical physicist, *5.12. 1932 in New York. He received the Ph.D. degree at Harvard University in 1958, where he is also professor since 1966. Glashow shared in the 1979 Nobel Prize in physics with Salam and Weinberg for his prediction of weak neutral currents and his contribution to the development of a unified theory of weak and electromagnetic interactions. He also predicted, with Iliopoulos and Maiani, the existence of the charmed quark.Google Scholar