Abstract
First, we present a combined analysis of pp to {mu}^{+}{v}_{mu }{mathrm{e}}^{-}{overline{v}}_{mathrm{e}} and pp to {mu}^{+}{v}_{mu }{mathrm{e}}^{-}{overline{v}}_{mathrm{e}}mathrm{j} at next-to-leading order, including both QCD and electroweak corrections. Second, we provide all-order predictions for pp to {mu}^{+}{v}_{mu }{mathrm{e}}^{-}{overline{v}}_{mathrm{e}}+ jets using merged parton-shower simulations that also include approximate EW effects. A fully inclusive sample for WW production is compared to the fixed-order computations for exclusive zero- and one-jet selections. The various higher-order effects are studied in detail at the level of cross sections and differential distributions for realistic experimental set-ups. Our study confirms that merged predictions are significantly more stable than the fixed-order ones in particular regarding ratios between the two processes.
Highlights
We present a combined analysis of pp → μ+νμe−νe and pp → μ+νμe−νej at next-to-leading order, including both QCD and electroweak corrections
The results presented here have been obtained with the combination Sherpa+Recola [28] which has already been used for several next-to-leading order (NLO) QCD and EW computations [47,48,49]
We present predictions based on a multiplicative scheme, cf. eq (2.12), to implement approximate NLO EW corrections in merged calculations of NLO QCD matrix elements for WW and WWj production matched to the Sherpa parton shower
Summary
We have opted for the 4-flavour scheme. bottom quarks are treated as massive, and contributions with bottom quarks in the initial state do not appear. Partonic processes with bottom quarks in the final state are omitted
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