Abstract
The mode-mode coupling expression for the critical first-sound damping parameterD 1 is renormalized using scaling and consistency arguments so as to avoid factorization of fluctuations and the uncertainty about the static susceptibility of the order parameter. Our functionD(ω,T −T λ) shows the high-frequency behavior obtained by Kawasaki, supporting the idea of “frequency scaling,” and it provides a quantitative estimate in reasonable agreement with experiment.
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