Resummation in QCD provides insight into the evolution of final state jets from short to long distances, and of accompanying interjet radiation. Applications to event shapes, including the recently-proposed angularities, suggest experimental tests of the interrelations between weak- and strong-coupling dynamics.
PACS numbers: 11.15.Bt, 12.38.Cy, 12.38.Lg, 12.38.Qk
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