Fits of ${\alpha }_s$ using power corrections in the three-jet region

Abstract

In this work we study the impact of recent findings regarding non-perturbative corrections in the three-jet region to $e^{+}{e}^{-}$ hadronic observables, by performing a simultaneous fit of the strong coupling constant ${\alpha }_s$ and the non-perturbative parameter ${\alpha }_0$. We extend the calculation of these power corrections, already known for thrust and C-parameter, to other $e^{+}{e}^{-}$ hadronic observables. We find that for some observables the non-perturbative corrections are reasonably well behaved in the two-jet limit, while for others they have a more problematic behaviour. If one limits the fit to the three-jet region and to the well-behaved observables, one finds in general very good results, with the extracted value of ${\alpha }_s$ agreeing well with the world average. This is the case in particular for the thrust and $C$-parameter for which notably small values of ${\alpha }_s$ have been reported when non-perturbative corrections have been computed using analytic methods. Furthermore, the more problematic variables are also well described provided one stays far enough from the two-jet limit, while in this same region they cannot be described using the traditional implementation of power-corrections based on two-jet kinematics.

arXiv comment38 pages, 9 figures

References in corpus (56)

• The anti-k_t jet clustering algorithm
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• An effective field theory for collinear and soft gluons: heavy to light decays
• Soft-Collinear Factorization in Effective Field Theory
• Herwig 7.0 / Herwig++ 3.0 Release Note
• Renormalons
• Antenna Subtraction at NNLO
• Drell-Yan production at small q_T, transverse parton distributions and the collinear anomaly
• Dispersive Approach to Power-Behaved Contributions in QCD Hard Processes
• Thrust at N^3LL with Power Corrections and a Precision Global Fit for alphas(mZ)
• A precise determination of alpha_s from LEP thrust data using effective field theory
• Power corrections to event shapes and factorization
• NNLO corrections to event shapes in $e^{+}{e}^{-}$ annihilation
• Momentum Flow Correlations from Event Shapes: Factorized Soft Gluons and Soft-Collinear Effective Theory
• Jet production in the CoLoRFulNNLO method: event shapes in electron-positron collisions
• Two-Loop Soft Corrections and Resummation of the Thrust Distribution in the Dijet Region
• Resummation of heavy jet mass and comparison to LEP data
• Combining Higher-Order Resummation with Multiple NLO Calculations and Parton Showers in GENEVA
• Jet rates in electron-positron annihilation at O(α_s^3) in QCD
• Three-jet production in electron-positron collisions using the CoLoRFulNNLO method
• On the QCD analysis of Jet Broadening
• Infrared structure of e+e- --> 3 jets at NNLO
• On the universality of the Milan factor for 1/Q power corrections to jet shapes
• Enhanced Nonperturbative Effects in Z Decays to Hadrons
• Power Corrections to Event Shapes with Mass-Dependent Operators
• Resummed $C$-Parameter Distribution in $e^{+}{e}^{-}$ Annihilation
• Hadron masses and power corrections to event shapes
• A Precise Determination of ${\alpha }_s$ from the C-parameter Distribution
• Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e+e- annihilations
• The back-to-back region in e^+e^- energy--energy correlation
• On the Universality of the Leading, $1/Q$ Power Corrections in QCD
• NNLL Resummation for Jet Broadening
• On power corrections to the event shape distributions in QCD
• Determination of the Strong Coupling \boldmath{\as} from hadronic Event Shapes and NNLO QCD predictions using JADE Data
• Semi-numerical resummation of event shapes
• Power corrections in the dispersive model for a determination of the strong coupling constant from the thrust distribution
• Precise determination of the strong coupling constant at NNLO in QCD from the three-jet rate in electron--positron annihilation at LEP
• Energy-energy correlation in electron-positron annihilation at NNLL+NNLO accuracy
• Factorization and Resummation for Jet Broadening
• Non-Perturbative Contribution to the Thrust Distribution in $e^{+}{e}^{-}$ Annihilation
• The two-jet rate in e^+e^- at next-to-next-to-leading-logarithmic order
• The thrust and heavy-jet mass distributions in the two-jet region
• The Sudakov radiator for jet observables and the soft physical coupling
• The C parameter distribution in e+e- annihilation
• Scaling of Power Corrections for Angularities from Dressed Gluon Exponentiation
• Dressed gluon exponentiation
• Precise determination of ${\alpha }_S(M_Z)$ from a global fit of energy-energy correlation to NNLO+NNLL predictions
• Measurement of the strong coupling alpha_S from the three-jet rate in e+e- - annihilation using JADE data
• On linear power corrections in certain collider observables
• $C$-parameter hadronisation in the symmetric 3-jet limit and impact on ${\alpha }_s$ fits
• Linear power corrections to $e^{+}{e}^{-}$ shape variables in the three-jet region
• Soft-gluon effective coupling and cusp anomalous dimension
• High precision determination of ${\alpha }_s$ from a global fit of jet rates
• On the universality of hadronisation corrections to QCD jets
• On the 1/Q correction to the C-parameter at two loops
• Power corrections to event shapes using eikonal dressed gluon exponentiation

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• Measurements of multijet event isotropies using optimal transport with the ATLAS detector
• Precision $e^{+}{e}^{-}$ Hemisphere Masses in the Dijet Region with Power Corrections
• Precision DIS thrust predictions for HERA and EIC
• Interplay between perturbative and non-perturbative effects with the ARES method
• EERAD3 version 2: QCD corrections in hadronic colour-singlet decays
• Two-loop form factors for $P$-wave quarkonium production and decay
• A Precise Determination of ${\alpha }_s$ from the Heavy Jet Mass Distribution
• Anomalous scaling of linear power corrections
• A Field Guide to Event-Shape Observables Using Optimal Transport