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arXiv · 1508.00581

Global constraints on anomalous triple gauge couplings in effective field theory approach

Adam Falkowski·Martin Gonzalez-Alonso·Admir Greljo·David Marzocca
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Abstract

We present a combined analysis of LHC Higgs data (signal strengths) together with LEP-2 WW production measurements. To characterize possible deviations from the Standard Model (SM) predictions, we employ the framework of an Effective Field Theory (EFT) where the SM is extended by higher-dimensional operators suppressed by the mass scale of new physics $Λ$. The analysis is performed consistently at the order $Λ^{-2}$ in the EFT expansion keeping all the relevant operators. While the two data sets suffer from flat directions, together they impose stringent model-independent constraints on the anomalous triple gauge couplings. As a side product, we provide the results of the combined fit in different EFT bases.

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Adam Falkowski, Martin Gonzalez-Alonso, Admir Greljo, David Marzocca. 2015-12-21. Global constraints on anomalous triple gauge couplings in effective field theory approach. https://doi.org/10.1103/physrevlett.116.011801

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