Anatomy of inclusive $t\overline{t}W$ production at hadron colliders

Abstract

In LHC searches for new and rare phenomena the top-associated channel $pp\to t\overline{t}{W}^{\pm }+X$ is a challenging background that multilepton analyses must overcome. Motivated by sustained measurements of enhanced rates of same-sign and multi-lepton final states, we reexamine the importance of higher jet multiplicities in $pp\to t\overline{t}{W}^{\pm }+X$ that enter at $\mathcal{O}({\alpha }_s^3\alpha )$ and $\mathcal{O}({\alpha }_s^4\alpha )$, i.e., that contribute at NLO and NNLO in QCD in inclusive $t\overline{t}{W}^{\pm }$ production. Using fixed-order computations, we estimate that a mixture of real and virtual corrections at $\mathcal{O}({\alpha }_s^4\alpha )$ in well-defined regions of phase space can arguably increase the total $t\overline{t}{W}^{\pm }$ rate at NLO by at least $10\%-14\%$. However, by using non-unitary NLO multi-jet matching, we estimate that these same corrections are at most $10\%-12\%$, and at the same time exhibit the enhanced jet multiplicities that are slightly favored by data. This seeming incongruity suggests a need for the full NNLO result. We comment on implications for the $t\overline{t}Z$ process.

11 pages, 4 figures (7 files), 3 tables, journal version (results unchanged)

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• LHAPDF6: parton density access in the LHC precision era
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Distinguishing seesaw models at LHC with multi-lepton signals
• Automation of next-to-leading order computations in QCD: the FKS subtraction
• Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• Next-to-leading order QCD corrections to t-tbar-Z production at the LHC
• Super-leading logarithms in non-global observables in QCD?
• Weak corrections to Higgs hadroproduction in association with a top-quark pair
• Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ cross sections in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
• Top-quark charge asymmetry and polarization in $t\bar{t}{W}^{\pm }$ production at the LHC
• NLO QCD corrections to W boson production with a massive b-quark jet pair at the Fermilab Tevatron p-pbar collider
• QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations
• Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons
• The simplest of them all: $t\bar{t}{W}^{\pm }$ at NLO accuracy in QCD
• Renormalization group improved predictions for $t\bar{t}{W}^{\pm }$ production at hadron colliders
• Subleading EW corrections and spin-correlation effects in $t\bar{t}W$ multi-lepton signatures

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• Hadronic production of top-quark pairs in association with a pair of leptons in the POWHEG BOX framework
• Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA
• Topping-up multilepton plus b-jets anomalies at the LHC with a $Z^{\prime }$ boson
• A radio-frequency WIMP search with the MeerKAT Galaxy Cluster Legacy Survey
• Matching in $pp\to t\bar{t}W/Z/h+$ jet SMEFT studies
• NLO QCD predictions for off-shell $t\bar{t}W$ production in association with a light jet at the LHC
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