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A new study on the indirect effects of new physics in the Higgs decay into four charged leptons channel is reported. We study the impact of the deviations induced by the effective field theory dimension–six operators on few relevant angular observables, and we compare them with the contribution of the full electroweak corrections. The calculation is implemented in a new version of the event generator Hto4l, which can provide predictions in terms of different EFT-bases and is available for data analyses at the LHC.

Higgs decay into four leptons in the presence of dimension–six operators