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arXiv · hep-ph/9704298

Power Corrections to Event Shape Distributions

Yu. L. Dokshitzer·B. R. Webber
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Abstract

We estimate the effects of non-perturbative physics on the differential distributions of infrared- and collinear-safe $e^+e^-$ event shape variables, by extending the notion of an infrared-regular effective strong coupling, which accounts for the non-perturbative corrections to the mean values of several shape variables, to their distributions. This leads to $1/Q$ power corrections over a range of values of the shape variables considered, where $Q$ is the centre-of-mass energy. In the case of the thrust variable, the leading correction is simply a shift of the distribution, by an amount proportional to $1/Q$. We show that this gives an excellent description of the data throughout a wide range of $T$ and $Q$.

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Yu. L. Dokshitzer, B. R. Webber. 1997-04-30. Power Corrections to Event Shape Distributions. https://doi.org/10.1016/s0370-2693(97)00573-x

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