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arXiv · 1806.00307

Next-to-leading order electroweak corrections to off-shell WWW production at the LHC

Marek Schönherr
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Abstract

Triboson processes allow for a measurement of the triple and quartic couplings of the Standard Model gauge bosons, which can be used to constrain anomalous gauge couplings. In this paper we calculate the next-to-leading order electroweak corrections to fully off-shell $W^-W^+W^+$ production, namely the production of a $\ell_1^-\ell_2^+\ell_3^+\barν_{\ell_1}ν_{\ell_2}ν_{\ell_3}$ final state with ($\ell_i=e,μ$), including all triple, double, single and non resonant topologies and interferences of diagrams with all different vector boson ($W,Z,γ$) intermediate states. We find large cancellations of the electroweak correction to the $q\bar{q}$-induced channel, which includes the exchange of virtual electroweak gauge bosons, and photon-induced jet radiation processes. This accidental compensation is found to be strongly phase space and observable dependent. The resulting corrections in a suitably defined fiducial region thus amount to $-2.0\%$, but rise rapidly for other observables.

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Marek Schönherr. 2018-06-01. Next-to-leading order electroweak corrections to off-shell WWW production at the LHC. https://doi.org/10.1007/jhep07(2018)076

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