Five-flavour scheme predictions for $t\bar{t}b\bar{b}$ at next-to-leading order accuracy

Abstract

We compute top quark pair production in association with a bottom quark pair at the LHC within the five-flavour scheme, matched to a parton shower, employing the FxFx merging scheme for $t\bar{t}+\text{jets}$ production with up to 2 jets at NLO accuracy. To enhance the selection efficiency for the events with $b$-jets within the inclusive five-flavour sample, we augment the generation probability of bottom quark flavours in the short-distance event generation. Our analysis reveals some differences from NLO predictions within the four-flavour scheme.

10 pages, 3 figures, published version

References in corpus (11)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Assault on the NLO Wishlist: pp -> tt bb
• NLO QCD corrections to pp -> t anti-t b anti-b + X at the LHC
• Observation of four-top-quark production in the multilepton final state with the ATLAS detector
• Top-pair production at the LHC with MiNNLO${}_{\mathrm{PS}}$
• Measurement of Higgs boson decay into $b$-quarks in associated production with a top-quark pair in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Observation of four top quark production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Multi-jet merging in a variable flavor number scheme
• $t\bar{t}b\bar{b}$ at the LHC: On the size of corrections and $b$-jet definitions
• Probing the $CP$ nature of the top-Higgs Yukawa coupling in $t\bar{t}H$ and $tH$ events with $H\to b\bar{b}$ decays using the ATLAS detector at the LHC
• $t\bar{t}b\bar{b}$ at the LHC: On the size of off-shell effects and prompt $b$-jet identification

Cited by in corpus (1)

• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist