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Mar25-04, 03:21 PM
PF Gold
P: 8,147
Jackiw, in his Yang-Mills retrospective says

‘tHooft concluded that baryon number is not conserved in the standard
model. By evaluating the Euclidean functional integral in a Gaussian approximation around
the instanton solution of Belavin et al., he calculated the baryon lifetime. Fortunately it is
exponentially small, but diamonds in principle are not forever