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arXiv · hep-ph/9712236

Renormalon Phenomena in Jets and Hard Processes

B. R. Webber
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Abstract

The `renormalon' or `dispersive' method for estimating non-perturbative corrections to QCD observables is reviewed. The corrections are power-suppressed, i.e. of the form $A/Q^p$ where $Q$ is the hard process momentum scale. The renormalon method exploits the connection between divergences of the QCD perturbation series and low-momentum dynamics to predict the power, $p$. The further assumption of an approximately universal low-energy effective strong coupling leads to relationships between the coefficients $A$ for different observables. Results on $1/Q^2$ corrections to deep inelastic structure functions and $1/Q$ corrections to event shapes are presented and compared with experiment. Shape variables that could be free of $1/Q$ and $\as(Q^2)/Q$ corrections are suggested.

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B. R. Webber. 1997-12-02. Renormalon Phenomena in Jets and Hard Processes. https://doi.org/10.1016/s0920-5632(98)00325-9

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