منابع مشابه
Radiative W and Z Decays and Spontaneous R-Parity Violation
We point out that in a class of supersymmetric models where R-parity violation is induced by the spontaneous breaking of local B − L symmetry, the R-parity violating W decay W → l̃γ and Z decay Z → ν̃γ, forbidden in the minimal supersymmetric standard model (MSSM), occur at an enhanced rate compared to other models with R-parity breaking. We find that the branching fractions for these modes can b...
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The mixing of a new Z ′ boson with the Z significantly improves the fit to the LEP precision electroweak data, provided that the Z ′ couples mainly to quarks. If M Z 2 < 200 GeV, the s-channel Z 2 production and (W, Z, γ)Z 2 pair production cross sections at the Tevatron give an excess above QCD of b ¯ b and (W, Z, γ)b ¯ b events, respectively, with invariant mass m(b ¯ b) ≈ M Z 2 , which provi...
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The electroweak theory elegantly combines the electromagnetic and weak forces, explaining a wide range of interactions using a gauge theory with just three parameters. The theory predicted the W and Z weak gauge bosons before they were directly observed in 1983, and its detailed predictions of W and Z boson properties have been tested to such precision that they now serve as probes for new part...
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This paper presents a logic for Object-Z which extends W, the logic for Z adopted as the basis of the deductive system in the Z Base Standard. The logic provides a basis on which tool support for reasoning about Object-Z speciications can be developed. It also formalises the intended meaning of Object-Z constructs and hence provides an abstract, axiomatic semantics of the language.
متن کاملTodd R. Steven W.
Images of Mars obtained using the Planetary Camera on the Hubble Space Telescope during 1990 and 1991 are described and analyzed. Multi-spectral images of Mars record the martian season between L~ = 348 and 60 corresponding to late winter and spring in the northern hemisphere. The wavelengths of these observations varied between 230 nm in the ultraviolet and 890 nm in the near infrared. We use ...
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ژورنال
عنوان ژورنال: Edukacja Filozoficzna
سال: 2018
ISSN: 0860-3839
DOI: 10.14394/edufil.2018.0009