A Search for Decays of the Higgs Boson to Invisible Particles in Events with a Top-Antitop Quark Pair or a Vector Boson in Proton-Proton Collisions at √s = 13 TeV

Authors

Armen R. Tumasyan, Yerevan Physics Institute

ORCID IDs

Tumasyan 0009-0000-0684-6742

Bloom 0000-0002-4272-8900

Claes 0000-0003-4198-8919

Fangmeier 0000-0002-5998-8047

Finco 0000-0002-2630-5465

Golf 0000-0003-3567-9351

Joo 0000-0002-5661-4330

Kravchenko 0000-0003-0068-0395

Reed 0000-0002-1823-8856

Siado 0000-0002-9757-470X

Tabb 0000-0002-9542-4847

Wightman 0000-0001-6651-5320

Yan 0000-0002-4042-0785

Zecchinelli 0000-0001-8986-278X

Date of this Version

8-23-2023

Citation

Journal of High Energy Physics (2023) 2023: 130

doi: 10.1007/JHEP06(2023)130

ArXiv ePrint: 2206.10657

Comments

License: CC BY

Abstract

The first search for nonresonant production of Higgs boson pairs (HH) with one H decaying into four leptons and the other into a pair of b quarks is presented, using proton-proton collisions recorded at a center-of-mass energy of √s = 13 TeV by the CMS experiment. The analyzed data correspond to an integrated luminosity of 138 fb⁻¹. A 95% confidence level upper limit of 32.4 is set on the signal strength modifier μ, defined as the ratio of the observed HH production rate in the HH → ZZ*bb → 4ℓbb decay channel to the standard model (SM) expectation. Possible modifications of the H trilinear coupling ^λHHH with respect to the SM value are investigated. The coupling modifier κ_λ, defined as ^λHHH divided by its SM prediction, is constrained to be within the observed (expected) range −8.8 (−9.8) < κ_λ < 13.4 (15.0) at 95% confidence level.