Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-11-15
JHEP 0001:014,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 4 figures, 1 table, JHEP style a typo in Reference section is corrected
Scientific paper
10.1088/1126-6708/2000/01/014
We compute power corrections to mean values of hadronic event shapes - the thrust and the C parameter - of tagged b quark events in electron positron annihilation, using the dispersive approach. We find that the leading power corrections are of the same type of 1/Q corrections as for event shapes in the massless case, with the same non-perturbative coefficient times a perturbatively calculable mass-dependent coefficient. The effect of the mass correction in the power correction is to reduce the latter by 10-30% for tagged b events, for centre-of-mass energies ranging from the Z peak down to 20 GeV.
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