Abstract
The production of top quark pairs in association with heavy Standard Model bosons or with heavy flavour quark pairs is important both as a signal and a background in several ATLAS analyses. At present, strong constraints on such processes cannot be obtained from data. Therefore, their modelling using Monte Carlo simulations as well as the associated uncertainties are of critical importance. This work documents the Monte Carlo samples currently being used in ATLAS for $t\bar{t}H$, $t\bar{t}V$ ($V~=W,Z$ vector bosons) and $t\bar{t}$+bottom quark pair processes for $\sqrt{s}$=13~TeV proton-proton collisions.
Highlights
√ ATLAS for ttH, ttV (V = W, Z vector bosons) and tt+bottom quark pair processes for s=13 TeV proton-proton collisions
The large center-of-mass energy available allows for the copious production of top quarks pairs in association with other particles at high transverse momentum enabling precise Standard Model (SM) measurements as well as probing many Beyond SM models that enhance rates for tt + X production
The reduction of theoretical uncertainties by exploiting advanced Monte Carlo (MC) event generators is the aim of this report
Summary
√ ATLAS for ttH, ttV (V = W, Z vector bosons) and tt+bottom quark pair processes for s=13 TeV proton-proton collisions. The productions of a Higgs or vector boson (W, Z) in association with a top quark pair (referred to as ttH, ttW and ttZ) are some of the main highlights of the physics program of the LHC Run 2.
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