High precision determination of ${\alpha }_s$ from a global fit of jet rates

Abstract

We present state-of-the-art extractions of the strong coupling based on N${}^3$LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at $e^{+}{e}^{-}$ collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at LEP and PETRA colliders, with energies spanning from $35$ GeV to $207$ GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the $Z$ mass is ${\alpha }_s(M_Z)=0.11881\pm 0.00063(exp.)\pm 0.00101(hadr.)\pm 0.00045(ren.)\pm 0.00034(res.)$, which is in agreement with the latest world average and has a comparable total uncertainty.

arXiv comment36 pages,13 figures, 5 tables

References in corpus (44)

• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• MadGraph 5 : Going Beyond
• Event generation with SHERPA 1.1
• Scattering Amplitudes with Open Loops
• Herwig 7.0 / Herwig++ 3.0 Release Note
• RunDec: a Mathematica package for running and decoupling of the strong coupling and quark masses
• Dispersive Approach to Power-Behaved Contributions in QCD Hard Processes
• AMEGIC++ 1.0, A Matrix Element Generator In C++
• 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
• A modified cluster-hadronization model
• NNLO corrections to event shapes in $e^{+}{e}^{-}$ annihilation
• NNLO corrections to 3-jet observables in electron-positron annihilation
• 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
• Event shapes and jet rates in electron-positron annihilation at NNLO
• Jet rates in electron-positron annihilation at O(α_s^3) in QCD
• C-parameter Distribution at N${}^3$LL${}^{\prime }$ including Power Corrections
• A subtraction scheme for computing QCD jet cross sections at NNLO: regularization of doubly-real emissions
• Color-dressed recursive relations for multi-parton amplitudes
• A subtraction scheme for computing QCD jet cross sections at NNLO: regularization of real-virtual emission
• First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e^+e^- annihilations
• Simplicity from Recoil: The Three-Loop Soft Function and Factorization for the Energy-Energy Correlation
• Controlling inclusive cross sections in parton shower + matrix element merging
• QCD Analyses and determinations of alpha-s in e+e- Annihilation at energies between 35 and 189 GeV
• The back-to-back region in e^+e^- energy--energy correlation
• Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e+e- annihilations
• NNLL Resummation for Jet Broadening
• 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
• Theoretical uncertainties on alpha_s from event-shape variables in e+e- annihilations
• Quartic mass corrections to R_had at order α_s^3
• The two-jet rate in e^+e^- at next-to-next-to-leading-logarithmic order
• Next-to-Leading-Order Corrections to the Production of Heavy-Flavour Jets in e+e- Collisions
• $e^{+}{e}^{-}$ angularity distributions at NNLL${}^{\prime }$ accuracy
• The Sudakov radiator for jet observables and the soft physical coupling
• Next-to-Leading-Order Corrections to Momentum Correlations in $Z^0\to b\bar{b}$
• 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
• Resummed jet rates for $e^{+}{e}^{-}$ annihilation into massive quarks
• Studies of correlations between measurements of jet observables

Cited by in corpus (11)

• 50 Years of Quantum Chromodynamics
• QCD Running Couplings and Effective Charges
• Fitting the Strong Coupling Constant with Soft-Drop Thrust
• $C$-parameter hadronisation in the symmetric 3-jet limit and impact on ${\alpha }_s$ fits
• Fits of ${\alpha }_s$ using power corrections in the three-jet region
• Groomed jet mass at high precision
• Precision physics with inclusive QCD processes
• Resummed predictions for jet-resolution scales in multijet production in $e^{+}{e}^{-}$ annihilation
• Determination of the strong-coupling constant from the $Z$-boson transverse-momentum distribution
• Interplay between perturbative and non-perturbative effects with the ARES method
• EERAD3 version 2: QCD corrections in hadronic colour-singlet decays