Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector at $\sqrt{s}=13$ TeV

Abstract

Cross-section measurements of top-quark pair production where the hadronically decaying top quark has transverse momentum greater than $355$ GeV and the other top quark decays into $\ell \nu b$ are presented using 139 fb${}^{-1}$ of data collected by the ATLAS experiment during proton-proton collisions at the LHC. The fiducial cross-section at $\sqrt{s}=13$ TeV is measured to be $\sigma =1.267\pm 0.005\pm 0.053$ pb, where the uncertainties reflect the limited number of data events and the systematic uncertainties, giving a total uncertainty of $4.2\%$. The cross-section is measured differentially as a function of variables characterising the $t\bar{t}$ system and additional radiation in the events. The results are compared with various Monte Carlo generators, including comparisons where the generators are reweighted to match a parton-level calculation at next-to-next-to-leading order. The reweighting improves the agreement between data and theory. The measured distribution of the top-quark transverse momentum is used to set limits on the Wilson coefficients of the dimension-six operators $O_{tG}$ and $O_{tq}^{(8)}$ in the effective field theory framework.

arXiv comment72 pages in total, authorlist starting on page 57, 29 figures, 7 tables, paper published by JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2019-23/

References in corpus (83)

• 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
• Parton distributions for the LHC
• 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
• Dimension-Six Terms in the Standard Model Lagrangian
• New parton distributions for collider physics
• Herwig++ Physics and Manual
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• PDF4LHC recommendations for LHC Run II
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Minimal Flavour Violation: an effective field theory approach
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Scattering Amplitudes with Open Loops
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• QCD Matrix Elements + Parton Showers
• Comix, a new matrix element generator
• Event Generation with Sherpa 2.2
• QCD matrix elements + parton showers: The NLO case
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• QCD matrix elements and truncated showers
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Single-top hadroproduction in association with a W boson
• The Catchment Area of Jets
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• Jet Trimming
• Muon reconstruction performance of the ATLAS detector in proton--proton collision data at $\sqrt{s}$=13 TeV
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• NLO single-top production matched with shower in POWHEG: s- and t-channel contributions
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• A critical appraisal of NLO+PS matching methods
• OpenLoops 2
• The CT10 NNLO Global Analysis of QCD
• Performance of pile-up mitigation techniques for jets in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector
• Uncertainties on alpha_S in global PDF analyses and implications for predicted hadronic cross sections
• Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
• Hadronic top-quark pair production with NNLL threshold resummation
• Jet reconstruction and performance using particle flow with the ATLAS Detector
• ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV
• Performance of electron and photon triggers in ATLAS during LHC Run 2
• Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV
• ATLAS data quality operations and performance for 2015-2018 data-taking
• Performance of missing transverse momentum reconstruction with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Jet energy scale and resolution measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Fully differential NNLO computations with MATRIX
• Performance of the ATLAS muon triggers in Run 2
• BAT - The Bayesian Analysis Toolkit
• High-precision differential predictions for top-quark pairs at the LHC
• Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO
• Top-pair production at the LHC through NNLO QCD and NLO EW
• Measurement of the top quark mass using proton-proton data at sqrt(s) = 7 and 8 TeV
• Automated one-loop computations in the SMEFT
• Non-resonant New Physics in Top Pair Production at Hadron Colliders
• Top-quark pair production at the LHC: Fully differential QCD predictions at NNLO
• Measurement of the top quark mass in the $t\bar{t}\to$ lepton+jets channel from $\sqrt{s}=8$ TeV ATLAS data and combination with previous results
• Higher order corrections to spin correlations in top quark pair production at the LHC
• Pinning down the large-x gluon with NNLO top-quark pair differential distributions
• Measurement of differential cross sections for the production of top quark pairs and of additional jets in lepton+jets events from pp collisions at $\sqrt{s}=$ 13 TeV
• Jets from Jets: Re-clustering as a tool for large radius jet reconstruction and grooming at the LHC
• Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in $\sqrt{s}$ = 8 TeV proton-proton collisions using the ATLAS detector
• Next-to-next-to-leading order event generation for top-quark pair production
• Measurements of $t\bar{t}$ differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector
• Data Unfolding Methods in High Energy Physics
• Search for single production of vector-like quarks decaying into $Wb$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• EFTfitter---A tool for interpreting measurements in the context of effective field theories
• Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in $pp$ collisions at $\sqrt{s}=13~\mbox{TeV}$ using the ATLAS detector
• Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV
• Measurement of the $t\bar{t}$ production cross-section in the lepton+jets channel at $\sqrt{s}=13$TeV with the ATLAS experiment
• Giving top quark effective operators a boost
• Probing the quantum interference between singly and doubly resonant top-quark production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of the cross section for $\text{t}\bar{\text{t}}$ production with additional jets and b jets in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurement of differential $\mathrm{t}\bar{\mathrm{t}}$ production cross sections using top quarks at large transverse momenta in pp collisions at $\sqrt{s}=$ 13 TeV
• Treatment of top-quark backgrounds in extreme phase spaces: the "top $p_T$ reweighting" and novel data-driven estimations in ATLAS and CMS

Cited by in corpus (7)

• 50 Years of Quantum Chromodynamics
• When the Machine Chimes the Bell: Entanglement and Bell Inequalities with Boosted $t\bar{t}$
• Measurement of the differential $\mathrm{t}\bar{\mathrm{t}}$ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks
• Collider-Flavour Complementarity from the bottom to the top
• Reweighting simulated events using machine-learning techniques in the CMS experiment
• Measurement of jet substructure in boosted $t\bar{t}$ events with the ATLAS detector using 140 fb${}^{-1}$ of 13 TeV $pp$ collisions
• Measurement of the Lund jet plane in hadronic decays of top quarks and W bosons with the ATLAS detector