Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method

Abstract

The azimuthal correlation, $\Delta {\varphi }_{12}$, of high transverse momentum jets in pp collisions at $\sqrt{s}=13$ TeV is studied by applying PB-TMD distributions to NLO calculations via MCatNLO together with the PB-TMD parton shower. A very good description of the cross section as a function of $\Delta {\varphi }_{12}$ is observed. In the back-to-back region of $\Delta {\varphi }_{12}\to \pi$, a very good agreement is observed with the PB-TMD Set 2 distributions while significant deviations are obtained with the PB-TMD Set 1 distributions. Set 1 uses the evolution scale while Set 2 uses transverse momentum as an argument in ${\alpha }_s$, and the above observation therefore confirms the importance of an appropriate soft-gluon coupling in angular ordered parton evolution. The total uncertainties of the predictions are dominated by the scale uncertainties of the matrix element, while the uncertainties coming from the PB-TMDs and the corresponding PB-TMD shower are very small. The $\Delta {\varphi }_{12}$ measurements are also compared with predictions using MCatNLO together PYTHIA8, illustrating the importance of details of the parton shower evolution.

arXiv comment15 pages, 8 Figures

References in corpus (43)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• 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
• FastJet user manual
• Parton distributions for the LHC Run II
• LHAPDF6: parton density access in the LHC precision era
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• Rivet user manual
• A standard format for Les Houches Event Files
• Three-jet cross sections in hadron-hadron collisions at next-to-leading order
• Jet pair production in POWHEG
• Transverse momentum dependent (TMD) parton distribution functions: status and prospects
• No Generalized TMD-Factorization in the Hadro-Production of High Transverse Momentum Hadrons
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• NNLO QCD predictions for single jet inclusive production at the LHC
• Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
• Automated Parton-Shower Variations in Pythia 8
• Soft-gluon resolution scale in QCD evolution equations
• Collinear and TMD parton densities from fits to precision DIS measurements in the parton branching method
• TMDlib and TMDplotter: library and plotting tools for transverse-momentum-dependent parton distributions
• The Two-Jet Differential Cross Section at $\mathcal{O}({\alpha }_s^3)$ in Hadron Collisions
• Collinear and TMD Quark and Gluon Densities from Parton Branching Solution of QCD Evolution Equations
• Single-jet inclusive rates with exact color at $\mathcal{O}({\alpha }_s^4)$
• Production of Z-bosons in the parton branching method
• Soft Gluon Resummations in Dijet Azimuthal Angular Correlations at the Collider
• Anisotropy in Dijet Production in Exclusive and Inclusive Processes
• Azimuthal decorrelations between QCD jets at all orders
• TMDlib2 and TMDplotter: a platform for 3D hadron structure studies
• Hadronic Dijet Imbalance and Transverse-Momentum Dependent Parton Distributions
• Transverse Momentum Resummation for Dijet Correlation in Hadronic Collisions
• CASCADE3 A Monte Carlo event generator based on TMDs
• Dynamical resolution scale in transverse momentum distributions at the LHC
• Angular correlations in multi-jet final states from kt-dependent parton showers
• Triple Differential Dijet Cross Section at the LHC
• Hadroproduction of electroweak gauge boson plus jets and TMD parton density functions
• Calculations with off-shell matrix elements, TMD parton densities and TMD parton showers
• Measurements of differential jet cross sections in proton-proton collisions at sqrt(s) = 7 TeV with the CMS detector
• Single jet inclusive production for the individual jet $p_T$ scale choice at the LHC
• Longitudinal momentum shifts, showering and nonperturbative corrections in matched NLO-shower event generators
• Collinearity approximations and kinematic shifts in partonic shower algorithms
• Scale and Scheme Variations in Unitarized NLO Merging
• Discriminating the heavy jet production mechanisms in associated $Z$ + heavy flavor events at the LHC

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• QCD resummation of dijet azimuthal decorrelations in pp and pA collisions
• Multi-jet Merging with TMD Parton Branching
• On the normalization of unintegrated parton densities
• Azimuthal decorrelation for photon induced dijet production in ultra-peripheral collisions of heavy ions
• Collinear and TMD distributions with dynamical soft-gluon resolution scale
• Coarse-grained binning in Drell-Yan transverse momentum spectra