The Jet Multiplicity as a Function of Thrust
Abstract
We calculate the average multiplicity of jets in e+e- annihilation as a function of both the jet resolution parameter, ycut, and the thrust T. Our result resums to all orders the leading and next-to-leading logarithms in ycut and 1-T, and is exact up to second order in alphas. This allows a comparison between the number of jets found using jet algorithms and the ability to distinguish different jet topologies via thrust.
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