NLO QCD corrections to off-shell $\text{t}\bar{\text{t}}\text{W}^+$ production at the LHC

Understand

We present results of a computation of NLO QCD corrections to the production of an off-shell top--antitop pair in association with an off-shell $\text{W}^+$ boson in proton--proton collisions.

• As the calculation is based on the full matrix elements for the process $\text{p}\text{p}\to {\text{e}}^+\nu_{\text{e}}\,\mu^-\bar{\nu}_\mu\,\tau^+\nu_\tau\,{\text{b}}\,\bar{\text{b}}$, all off-shell, spin-correlation, and interference effects are included.
• The NLO QCD corrections are about $20\%$ for the integrated cross-section.
• Using a dynamical scale, the corrections to most distributions are at the same level, while some distributions show much larger $K$-factors in suppressed regions of phase space.