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- W2039605271 abstract "Violations of Lorentz invariance that appear via operators of dimension four or less are completely parametrized in the Standard Model Extension (SME). In the pure photonic sector of the SME, there are 19 dimensionless, Lorentz-violating parameters. Eighteen of these have experimental upper bounds ranging between ${10}^{ensuremath{-}11}$ and ${10}^{ensuremath{-}32}$; the remaining parameter, ${stackrel{texttildelow{}}{k}}_{mathrm{tr}}$, is isotropic and has a much weaker bound of order ${10}^{ensuremath{-}4}$. In this Brief Report, we point out that ${stackrel{texttildelow{}}{k}}_{mathrm{tr}}$ gives a significant contribution to the anomalous magnetic moment of the electron and find a new upper bound of order ${10}^{ensuremath{-}8}$. With reasonable assumptions, we further show that this bound may be improved to ${10}^{ensuremath{-}14}$ by considering the renormalization of other Lorentz-violating parameters that are more tightly constrained. Using similar renormalization arguments, we also estimate bounds on Lorentz-violating parameters in the pure gluonic sector of QCD." @default.
- W2039605271 created "2016-06-24" @default.
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- W2039605271 date "2006-10-20" @default.
- W2039605271 modified "2023-10-02" @default.
- W2039605271 title "New bounds on isotropic Lorentz violation" @default.
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- W2039605271 doi "https://doi.org/10.1103/physrevd.74.077901" @default.
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