Hadron masses and power corrections to event shapes

Details Hadron masses and power corrections to event shapes Hadron masses and power corrections to event shapes

2001-02-28

arxiv.org/abs/hep-ph/0102343v2

JHEP 0105 (2001) 061

Physics

High Energy Physics

High Energy Physics - Phenomenology

46 pages, LaTeX with amsmath and amssymb packages. This version has an amplified discussion of various issues and some extra r

Scientific paper

10.1088/1126-6708/2001/05/061

It is widely believed that hadronisation leads to 1/Q corrections to e+e- event shapes. We show that there are further corrections, proportional to (ln Q)^A/Q with A=4C_A/beta_0~=1.6, associated with hadron masses and whose relative normalisations can be calculated from one observable to another. At today's energies these extra corrections can be of the same order of magnitude as `traditional' 1/Q corrections. They fall into two classes: universal and non-universal. The latter can be eliminated by suitable redefinitions of the observables.

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