αS and power corrections from JADE

Determination of αs from Event Shapes and Power Corrections

The size of non-perturbative corrections to event shape observables is predicted to fall like a power of the inverse centre of mass energy. These power corrections are investigated for different observables from ee-annihilation and compared to the theoretical predictions. Using the latest DELPHI high energy data advantages of determining αs from these predictions are discussed and compared to c...

Event Shapes from JADE Data and Studies of Power Corrections

3 Se p 20 02 1 α S and Power Corrections from JADE

Re-analysed JADE data were used to determine αS at √ s = 14-44 GeV on the basis of resummed calculations for event shapes and hadronisation models tuned to LEP data. The combined result is αS(M Z 0) = 0.1194 which is consistent with the world average. Event shapes have also been used to test power corrections based on an analytical model and to verify the gauge structure of QCD. The only non-pe...

/ 02 09 02 2 v 1 1 1 Se p 20 02 1 α S and Power Corrections from JADE

Re-analysed JADE data were used to determine αS at √ s = 14-44 GeV on the basis of resummed calculations for event shapes and hadronisation models tuned to LEP data. The combined result is αS(M Z 0) = 0.1194 which is consistent with the world average. Event shapes have also been used to test power corrections based on an analytical model and to verify the gauge structure of QCD. The only non-pe...

Power Corrections from Small Distances. *

Power corrections have been discussed intensely in recent years, in particular, in review talks at the conferences in this series [1]. Thus, we would skip the general motivation and background. Instead, we will concentrate on one particular issue, that is speculations on hypothetical power corrections associated with short distances [2,3]. For the talk to be self contained, however, we will inc...