m(b)(m(z)) from jet production at the Z peak in the Cambridge algorithm - art. no. 114006

We consider the production of heavy quark jets at the Z pole at next-to-lea ding order (NLO) using the Cambridge jet algorithm. We study the effects of the quark mass in two- and three-jet observables and the uncertainty due t o unknown higher-order corrections as well as due to fragmentation. We find that the three-jet observable has remarkably small NLO corrections, which are stable with respect to the change of the renormalization scale, when ex pressed in terms of the running quark mass at the mt scale. The size of the hadronization uncertainty for this observable remains reasonably small and is very stable with respect to changes in the jet resolution parameter y(c ). [S0556-2821(98)01921-9].