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arXiv · 2210.11312

Modelling uncertainties of $t\overline{t}W$ in multi-lepton channel

Jasmina Nasufi
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Abstract

We compare fixed order and parton shower matched predictions for the process ${pp\rightarrow \ell^+ν_{\ell} \ell^-\barν_{\ell} \ell^{\pm}ν_{\ell} b\bar{b}+X}$ at NLO in QCD, including the orders $\mathcal{O}(α_s^3α^6)$ and $\mathcal{O}(α_sα^8)$. The comparison is performed at the integrated and differential fiducial level at the LHC with $\sqrt{s}=13$ TeV. In the absence of parton shower matching procedure that includes the full off-shell effects for this process at NLO in QCD, we propose a new prescription. It enables the inclusion of approximate full off-shell effects to currently available parton shower matched predictions at NLO in QCD.

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Jasmina Nasufi. 2022-12-05. Modelling uncertainties of $t\overline{t}W$ in multi-lepton channel. https://arxiv.org/abs/2210.11312

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