Non-Perturbative Contribution to the Thrust Distribution in $e^{+}{e}^{-}$ Annihilation

Abstract

We re-evaluate the non-perturbative contribution to the thrust distribution in $e^{+}{e}^{-}\to$ hadrons, in the light of the latest experimental data and the recent NNLO perturbative calculation of this quantity. By extending the calculation to NNLO+NLL accuracy, we perform the most detailed study to date of the effects of non-perturbative physics on this observable. In particular, we investigate how well a model based on a low-scale QCD effective coupling can account for such effects. We find that the difference between the improved perturbative distribution and the experimental data is consistent with a $1/Q$-dependent non-perturbative shift in the distribution, as predicted by the effective coupling model. Best fit values of ${\alpha }_s(M_Z)=0.1164_{-0.0026}^{+0.0028}$ and ${\alpha }_0(2GeV)=0.59+/-0.03$ are obtained with ${\chi }^2/d.o.f.=1.09$. This is consistent with NLO+NLL results but the quality of fit is improved. The agreement in ${\alpha }_0$ is non-trivial because a part of the 1/Q-dependent contribution (the infrared renormalon) is included in the NNLO perturbative correction.

13 pages, 10 figures. Published version, minor changes

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• Hadronization effects in event shape moments
• What is the Top Quark Mass?
• Toward Multi-Differential Cross Sections: Measuring Two Angularities on a Single Jet
• $e^{+}{e}^{-}$ angularity distributions at NNLL${}^{\prime }$ accuracy
• On the Cutoff Dependence of the Quark Mass Parameter in Angular Ordered Parton Showers
• Moments of event shapes in electron-positron annihilation at NNLO
• Fitting the Strong Coupling Constant with Soft-Drop Thrust
• Jet Shape Resummation Using Soft-Collinear Effective Theory
• On linear power corrections in certain collider observables
• Soft-Drop Thrust
• $C$-parameter hadronisation in the symmetric 3-jet limit and impact on ${\alpha }_s$ fits
• Electroweak corrections to hadronic event shapes and jet production in e+e- annihilation
• Fits of ${\alpha }_s$ using power corrections in the three-jet region
• Boosted Top Quarks in the Peak Region with N${}^3$LL Resummation
• Precision physics with inclusive QCD processes
• Strong coupling constant and quark masses from lattice QCD
• Modelling theoretical uncertainties in phenomenological analyses for particle physics
• Electroweak corrections to three-jet production in electron-positron annihilation
• Revisiting the role of grooming in DIS
• Constraints on color-octet fermions from a global parton distribution analysis
• Resummation of Jet Shapes and Extracting Properties of the Quark-Gluon Plasma
• Prospects for strong coupling measurement at hadron colliders using soft-drop jet mass
• Accuracy and Precision in Collider Event Shapes
• Electroweak corrections to hadronic event shapes
• Matching of Resummed NLLA with Fixed NNLO for Event Shapes
• Thrust distribution resummation in e^{+}e^{-} collisions
• Event Shape Variables at NLLA+NNLO