Transverse momentum resummation effects in W^+W^- measurements

Abstract

The W^+W^- cross section has remained one of the most consistently discrepant channels compared to SM predictions at the LHC, measured by both ATLAS and CMS at 7 and 8 TeV. Developing a better modeling of this channel is crucial to understanding properties of the Higgs and potential new physics. In this paper we investigate the effects of NNLL transverse momentum resummation in measuring the W^+W^- cross section. In the formalism we employ, transverse momentum resummation does not change the total inclusive cross section, but gives a more accurate prediction for the p_T distribution of the diboson system. By re-weighting the p_T distribution of events produced by Monte Carlo generators, we find a systematic shift that decreases the experimental discrepancy with the SM prediction by approximately 3-7% depending on the MC generator and parton shower used. The primary effect comes from the jet veto cut used by both experiments. We comment on the connections to jet veto resummation, and other methods the experiments can use to test this effect. We also discuss the correlation of resummation effects in this channel with other diboson channels. Ultimately p_T resummation improves the agreement between the SM and experimental measurements for most generators, but does not account for the measured ~20% difference with the SM and further investigations into this channel are needed.

arXiv comment21 pages, 9 figures, v2: minor changes/refs updated

References in corpus (56)

• 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
• Parton distributions for the LHC
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• 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
• Herwig++ Physics and Manual
• Matching NLO QCD computations and parton shower simulations
• Soft-gluon resummation for Higgs boson production at hadron colliders
• Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC
• Transverse-momentum resummation and the spectrum of the Higgs boson at the LHC
• Drell-Yan production at small q_T, transverse parton distributions and the collinear anomaly
• ZZ production at hadron colliders in NNLO QCD
• Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states
• Inadequacy of zero-width approximation for a light Higgs boson signal
• Universality of non-leading logarithmic contributions in transverse-momentum distributions
• Efficient evolution of unpolarized and polarized parton distributions with QCD-PEGASUS
• Renormalization-Group Improved Prediction for Higgs Production at Hadron Colliders
• Higgs Production with a Central Jet Veto at NNLL+NNLO
• Transverse-momentum resummation: Higgs boson production at the Tevatron and the LHC
• Prompt neutrinos from atmospheric c-cbar and b-bbar production and the gluon at very small x
• The q_T spectrum of the Higgs boson at the LHC in QCD perturbation theory
• Higgs and Z-boson production with a jet veto
• Production of Drell--Yan lepton pairs in hadron collisions: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
• Jet p_T Resummation in Higgs Production at NNLL'+NNLO
• Measurement of W+W- and ZZ production cross sections in pp collisions at sqrt(s) = 8 TeV
• NLL+NNLO predictions for jet-veto efficiencies in Higgs-boson and Drell-Yan production
• Origin of the Large Perturbative Corrections to Higgs Production at Hadron Colliders
• Factorization and NNLL Resummation for Higgs Production with a Jet Veto
• Factorization and N^3LL_p+NNLO Predictions for the Higgs Cross Section with a Jet Veto
• Higher-Order QCD Corrections in Prompt Photon Production
• Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings
• Measurement of the W+W- cross section in pp collisions at sqrt(s) = 7 TeV and limits on anomalous WW gamma and WWZ couplings
• Precise Higgs-background predictions: merging NLO QCD and squared quark-loop corrections to four-lepton + 0,1 jet production
• Transverse-momentum resummation: a perturbative study of Z production at the Tevatron
• Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8 TeV
• Resummation Properties of Jet Vetoes at the LHC
• Signal-background interference effects for $gg\to H\to W^{+}{W}^{-}$ beyond leading order
• Natural SUSY in Plain Sight
• Charginos Hiding In Plain Sight
• Interference effects for H --> WW/ZZ --> l anti-nu_l anti-l nu_l searches in gluon fusion at the LHC
• Soft-gluon effects in WW production at hadron colliders
• Light stops emerging in WW cross section measurements?
• Threshold Resummed and Approximate NNLO results for W+W- Pair Production at the LHC
• Jet Vetoes Interfering with H->WW
• Measurement of the $W$ boson mass with the D0 detector
• WZ production beyond NLO for high-pT observables
• Effective K-factors for gg -> H -> WW -> lnu lnu at the LHC
• Higgs Production Amidst the LHC Detector
• WW production at high transverse momenta beyond NLO
• Soft-gluon resummation for pseudoscalar Higgs boson production at hadron colliders
• Transverse-Momentum Resummation for Gauge Boson Pair Production at the Hadron Collider
• Casting Light on BSM Physics with SM Standard Candles

Cited by in corpus (43)

• $W^{\pm }Z$ production at the LHC: fiducial cross sections and distributions in NNLO QCD
• Understanding the large-distance behavior of transverse-momentum-dependent parton densities and the Collins-Soper evolution kernel
• QCD corrections to $W^{+}{W}^{-}$ production through gluon fusion
• Measurements of properties of the Higgs boson decaying to a W boson pair in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the W+ W- cross section in pp collisions at sqrt(s) = 8 TeV and limits on anomalous gauge couplings
• Vector boson production at hadron colliders: transverse-momentum resummation and leptonic decay
• Measurement of total and differential $W^{+}{W}^{-}$ production cross sections in proton-proton collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector and limits on anomalous triple-gauge-boson couplings
• Multi-Boson Interactions at the LHC
• QCD resummation for hadronic final states
• Measurement of fiducial and differential $W^{+}{W}^{-}$ production cross-sections at $\sqrt{s}=$13 TeV with the ATLAS detector
• NNLOPS accurate predictions for $W^{+}{W}^{-}$ production
• Search for a heavy Higgs boson decaying to a pair of W bosons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Automated NNLL+NLO Resummation for Jet-Veto Cross Sections
• W${}^{+}$W${}^{-}$ boson pair production in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at $\sqrt{s}=$ 13 TeV
• NLO QCD+NLO EW corrections to diboson production matched to parton shower
• $W^{+}{W}^{-}$ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel
• Measurements of the Higgs boson production cross section and couplings in the W boson pair decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the $W^{+}{W}^{-}$ production cross section in $pp$ collisions at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV with the ATLAS experiment
• Safe Jet Vetoes
• Search for dark matter particles produced in association with a Higgs boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Jet vetoes versus giant K-factors in the exclusive Z+1-jet cross section
• Resummation of Jet Veto Logarithms at partial N${}^3$LL + NNLO for $W^{+}{W}^{-}$ Production at the LHC
• $W^{+}{W}^{-}$ production at NNLO+PS with MiNNLO${}_{\mathrm{PS}}$
• Precision measurement of the W boson decay branching fractions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Contributions of flavor violating couplings of a Higgs boson to $pp\to WW$
• Refining light stop exclusion limits with $W^{+}{W}^{-}$ cross sections
• Measurement of $W^{+}{W}^{-}$ production in association with one jet in proton--proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Resummation prediction on gauge boson pair production with a jet veto
• Sleptons without Hadrons
• Transverse-momentum resummation for vector-boson pair production at NNLL+NNLO
• Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Precision diboson measurements and the interplay of pT and jet-veto resummations
• Transverse momentum resummation at N3LL+NNLO for diboson processes
• Distinctive Heavy Higgs Decays
• A New Observable for Identifying Dijet Resonances
• $k_t$-factorization vs collinear factorization in $W^{+}{W}^{-}$ pair production at the LHC
• Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
• Theory Summary and Prospects
• Search for dark matter particles in W${}^{+}$W${}^{-}$ events with transverse momentum imbalance in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurements of $W^{+}{W}^{-}$ production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Using Random Forests to Classify W+W- and ttbar Events
• Threshold resummation for $W$-boson pair production at NNLO+NNLL