# Higgs 2021

Oct 18 – 22, 2021
America/New_York timezone

## Off-shell Higgs Couplings in $H^*\to ZZ\to \ell\ell\nu\nu$

Oct 20, 2021, 9:10 AM
10m
Parallel Sessions Higgs-boson properties

### Speaker

Han Qin (University of Pittsburgh)

### Description

We explore the new physics reach for the off-shell Higgs boson measurement in the $pp \to H^* \rightarrow Z(\ell^{+}\ell^{-})Z(\nu\bar{\nu})$ 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.

### Primary authors

Dorival Gonçalves (Oklahoma State University) Han Qin (University of Pittsburgh) Sze Ching Iris Leung (University of Pittsburgh) Tao Han (University of Pittsburgh)

### Presentation materials

 OffShell_Higgs2021.mp4 OffShell_Higgs2021.pdf