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Strong renormalization scheme dependence in τ-lepton decays: fact or fiction?
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Strong renormalization scheme dependence in $\tau$-lepton decays: fact or fiction?
abstract
The question of the renormalization scheme dependence of the $\tau$ semileptonic decay rate is revisited in response to a recent criticism. Particular attention is payed to a distinction between a consistent quantitative description of this dependence and the actual selection of a subset of ``acceptable'' renormalization schemes. It is argued that a reasonable universal measure of the renormalization scheme dependence can be formulated, which gives encouraging results when applied to various physical quantities, including the semileptonic $\tau$ decay rate.
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