Top quark pair production with fully hadronic final states at the LHC

This public dataset was used to develop HyPER (Hypergraph for Particle Event Reconstruction). HyPER uses blended graph-hypergraph representation learning to reconstruct short-lived particles produced at the LHC. Production Software Matrix Elements (ME) and NLO Matching: MadGraph5_aMC@NLO (v2.9.16 LTS) at (\sqrt{s}=13) TeV. Parton Distribution Function (PDF): NNPDF3.0nlo from LHAPDF6 (v6.3.0). Parton Shower: PYTHIA8 (v8.306). Detector: Delphes (v3.5.0), ATLAS detector geometry. Jet Reconstruction: Fastjet (v3.4.0), anti-(k_t) algorithm with (R=0.4) Jet truth matching Jets are matched to their originating particles using the (\Delta R) truth matching scheme. If the angular distance between a particle and its nearest jet satisfies (\Delta R < 0.4), then the jet is matched to the particle. We use the following integer labels in jet_truthmatch: 0, 1, 2, 3, 4, 5, 6 ("not matched", b1, W1q1, W1q2, b2, W2q1, W2q2). Event selections Events contain at least 6 jets, of which 2 or more are b-tagged. At least one identifiable W boson (two jets are matched to the decays of a W boson). Reconstructed jets have a minimum (p_T) of 25 GeV and an absolute pseudorapidity (|\eta|<2.5). Dataset Information   Training Validation Testing Size-reduced Dataset name ttbar_train.root ttbar_val.root ttbar_test.root ttbar_reduced.root Internal ID 762705-{0-53} 762705-{54-56} 762705-{57-59} Sampled from ttbar_train.root Number of events 54M 3M 3M 3M Pass selections 7,921,299 439,692 440,069 439,598 Both tops matched 2,116,231 117,487 116,960 117,812 Max number of jets 20 20 18 20 Only events that have passed selections are saved. Dataset structure Events are saved in ROOT files. They have the following structure: - Delphes ---- njet // Int; Number or jets ---- nbTagged // Int; Number of b-tagged jets ---- allMatchedEvent // Int; Event is fully matched (1 or 0) ---- leastOneMatchedW // Int; Event contains at least one matched W (1 or 0) ---- jet_pt // vector; Transverse momentum of jets ---- jet_eta // vector; Pseudo-rapidity of jets ---- jet_phi // vector; Azimuthal angle of jets ---- jet_e // vector; Energy of jets ---- jet_m // vector; Invariant mass of jets ---- jet_bTag // vector