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

Abstract

We study the indirect effects of New Physics in the Higgs decay into four charged leptons, using an Effective Field Theory (EFT) approach to Higgs interactions. We evaluate the deviations induced by the EFT dimension-six operators in observables like partial decay width and various kinematic distributions, including angular observables, and compare them with the contribution of the full SM electroweak corrections. The calculation is implemented in an improved version of the event generator Hto4l, which can provide predictions in terms of different EFT-bases and is available for data analysis at the LHC. We also perform a phenomenological study in order to assess the benefits coming from the inclusion of differential information in the future analyses of very precise data which will be collected during the high luminosity phase of the LHC.

31 pages, 8 figures, 1 table. Version to appear on JHEP, expanded phenomenological section including an analysis for HL-LHC

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Cited by in corpus (11)

• The Standard Model as an Effective Field Theory
• Higgs boson production cross-section measurements and their EFT interpretation in the $4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Higgs Decays to $ZZ$ and $Z\gamma$ in the SMEFT: an NLO analysis
• Measurements of the Higgs boson inclusive and differential fiducial cross sections in the 4$\ell$ decay channel at $\sqrt{s}$ = 13 TeV
• Software and computing for Run 3 of the ATLAS experiment at the LHC
• Precision calculations for h->WW/ZZ->4 fermions in the Two-Higgs-Doublet Model with PROPHECY4F
• PROPHECY4F 3.0: A Monte Carlo program for Higgs-boson decays into four-fermion final states in and beyond the Standard Model
• Precision calculations for $h\to WW/ZZ\to 4$ fermions in a Singlet Extension of the Standard Model with Prophecy4f
• Polarized Z bosons from the decay of a Higgs boson produced in association with two jets at the LHC
• Primary Observables for Indirect Searches at Colliders
• Identical particle and lepton mass effects in the decay $H\to Z^{\ast }(\to {\tau }^{+}{\tau }^{-})+Z^{\ast }(\to {\tau }^{+}{\tau }^{-})$