Abstract :
Bödeker has recently shown that the high temperature sphaleron rate, which measures baryon number violation in the hot standard model, receives logarithmic corrections to its leading parametric behavior; Γ=κ′[log(mD/g2T)+O(1)](g2T2/mD2)αW5T4. After discussing the physical origin of these corrections, I compute the leading log coefficient numerically: κ′=10.8±0.7. The log is fairly small relative to the O(1) “correction;” so non-logarithmic contributions dominate at realistic values of the coupling.
