Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

A measurement is presented of a ratio observable that provides a measure of the azimuthal correlations among jets with large transverse momentum $p_{\mathrm{T}}$. This observable is measured in multijet events over the range of $p_{\mathrm{T}}$ = 360-3170 GeV based on data collected by the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 134 fb${}^{-1}$. The results are compared with predictions from Monte Carlo parton-shower event generator simulations, as well as with fixed-order perturbative quantum chromodynamics (pQCD) predictions at next-to-leading-order (NLO) accuracy obtained with different parton distribution functions (PDFs) and corrected for nonperturbative and electroweak effects. Data and theory agree within uncertainties. From the comparison of the measured observable with the pQCD prediction obtained with the NNPDF3.1 NLO PDFs, the strong coupling at the Z boson mass scale is ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$ = 0.1177 $\pm$ 0.0013 (exp) ${}_{-0.0073}^{+0.0116}$ (theo) = 0.1177 ${}_{-0.0074}^{+0.0117}$, where the total uncertainty is dominated by the scale dependence of the fixed-order predictions. A test of the running of ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$ in the TeV region shows no deviation from the expected NLO pQCD behaviour.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-22-005 (CMS Public Pages)

References in corpus (71)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• Herwig++ Physics and Manual
• LHAPDF6: parton density access in the LHC precision era
• Parton distributions from high-precision collider data
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Event Generation with Sherpa 2.2
• Particle-flow reconstruction and global event description with the CMS detector
• The CMS trigger system
• New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Parton distributions with QED corrections
• Inclusive Jet Production, Parton Distributions, and the Search for New Physics
• Five-Loop Running of the QCD coupling constant
• Soft-gluon resummation for Higgs boson production at hadron colliders
• Next-to-leading order calculation of three-jet observables in hadron-hadron collision
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• Parton Distribution Functions, ${\alpha }_s$ and Heavy-Quark Masses for LHC Run II
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Uncertainties of predictions from parton distribution functions II: the Hessian method
• Robust Independent Validation of Experiment and Theory: Rivet version 3
• The t-tbar cross-section at 1.8 and 1.96 TeV: a study of the systematics due to parton densities and scale dependence
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Three-jet cross sections in hadron-hadron collisions at next-to-leading order
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• RECOLA: REcursive Computation of One-Loop Amplitudes
• Phenomenology of event shapes at hadron colliders
• Recursive generation of one-loop amplitudes in the Standard Model
• Pileup mitigation at CMS in 13 TeV data
• TUnfold: an algorithm for correcting migration effects in high energy physics
• Constraining MPI models using sigma_effective and recent Tevatron and LHC Underlying Event data
• Measurement and QCD analysis of double-differential inclusive jet cross-sections in pp collisions at sqrt(s) = 8 TeV and ratios to 2.76 and 7 TeV
• Measurement of the $\mathrm{t}\overline{\mathrm{t}}$ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at $\sqrt{s}=$ 13 TeV
• A first next-to-next-to-leading order study of three-jet production at the LHC
• fastNLO: Fast pQCD Calculations for PDF Fits
• Measurement of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section in pp collisions at sqrt(s) = 7 TeV and first determination of the strong coupling constant in the TeV range
• Measurement of the inclusive 3-jet production differential cross section in proton-proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range
• Measurement of $\mathrm{t}\bar{\mathrm{t}}$ normalised multi-differential cross sections in pp collisions at $\sqrt{s}=13$ TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions
• Jet Production in ep Collisions at High Q^2 and Determination of alpha_s
• Determination of the strong coupling constant from the inclusive jet cross section in ppbar collisions at sqrt(s)=1.96 TeV
• Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at sqrt(s) = 7 TeV
• An automated subtraction of NLO EW infrared divergences
• Infrared sensitivity of single jet inclusive production at hadron colliders
• Jet Production in ep Collisions at Low Q^2 and Determination of alpha_s
• Automation of NLO QCD and EW corrections with Sherpa and Recola
• Measurement of angular correlations of jets at sqrt(s)=1.96 TeV and determination of the strong coupling at high momentum transfers
• Measurement of jet substructure observables in $\mathrm{t}\overline{\mathrm{t}}$ events from proton-proton collisions at $\sqrt{s}=$ 13TeV
• Measurement of the Strong Coupling Constant from Inclusive Jet Production at the Tevatron $\bar{p}p$ Collider
• Determination of the strong coupling constant ${\alpha }_s$ from transverse energy-energy correlations in multijet events at $\sqrt{s}=8$ TeV using the ATLAS detector
• Inclusive-jet photoproduction at HERA and determination of alphas
• Evaluation of the Strong Coupling Constant alpha_s Using the ATLAS Inclusive Jet Cross-Section Data
• NNLO QCD corrections to event shapes at the LHC
• Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of transverse energy-energy correlations in multi-jet events in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector and determination of the strong coupling constant ${\alpha }_{\mathrm{s}}(m_Z)$
• Jet-radius dependence of inclusive-jet cross sections in deep inelastic scattering at HERA
• Measurement of the triple-differential dijet cross section in proton-proton collisions at sqrt(s) = 8 TeV and constraints on parton distribution functions
• Multijet production in neutral current deep inelastic scattering at HERA and determination of alpha_s
• Determination of the strong coupling constant from transverse energy$-$energy correlations in multijet events at $\sqrt{s}=13$ TeV with the ATLAS detector
• Full NLO corrections to 3-jet production and R32 at the LHC
• Measurement of dijet azimuthal decorrelations in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector and determination of the strong coupling
• Determination of the strong coupling constant ${\alpha }_S(m_{\mathrm{Z}})$ from measurements of inclusive W${}^{\pm }$ and Z boson production cross sections in proton-proton collisions at $\sqrt{s}=$ 7 and 8 TeV
• Strong coupling ${\alpha }_s(m_Z)$ extraction from a combined NNLO analysis of inclusive electroweak boson cross sections at hadron colliders
• A new quantity for studies of dijet azimuthal decorrelations

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