Off-shell Higgs couplings in H⁎ → ZZ → ℓℓνν

We explore the new physics reach for the off-shell Higgs boson measurement in the pp→H⁎→Z(ℓ+ℓ−)Z(νν¯) channel at the high-luminosity LHC. The new physics sensitivity is parametrized in terms of the Higgs boson width, effective field theory framework, and a non-local Higgs-top coupling form factor. A...

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Bibliographic Details
Published inPhysics letters. B Vol. 817; no. C; p. 136329
Main Authors Gonçalves, Dorival, Han, Tao, Ching Iris Leung, Sze, Qin, Han
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.06.2021
Elsevier
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Summary:We explore the new physics reach for the off-shell Higgs boson measurement in the pp→H⁎→Z(ℓ+ℓ−)Z(νν¯) channel at the high-luminosity LHC. The new physics sensitivity is parametrized in terms of the Higgs boson width, effective field theory framework, and a non-local Higgs-top coupling form factor. Adopting Machine-learning techniques, we demonstrate that the combination of a large signal rate and a precise phenomenological probe for the process energy scale, due to the transverse ZZ mass, leads to significant sensitivities beyond the existing results in the literature for the new physics scenarios considered.
Bibliography:USDOE
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2021.136329