CMS-PAS-HIG-22-006

CMS-PAS-HIG-22-006
Search for Higgs boson pair production with one associated vector boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
CMS Collaboration
24 March 2023

Abstract: A search is presented for Higgs boson pair production (HH) associated with a vector boson V (W or Z boson) with 138 fb $^{-1}$ of proton-proton (pp) collisions at a center-of-mass energy of 13 TeV with the CMS detector at the LHC at CERN. The processes in this search include $\text{pp}\to\text{ZHH}$ and $\text{pp}\to\text{WHH}$ production. All hadronic decays and leptonic decays of W and Z bosons involving electrons, muons, and neutrinos are utilized. The decay channel of the Higgs bosons is restricted to $\text{b}\bar{\text{b}}\text{b}\bar{\text{b}}$ . An observed (expected) upper limit at 95% confidence level (CL) is set at 294 (124) times the cross section from the standard model prediction of the $\text{pp}\to\text{VHH}$ process. Constraints are also set on the modifier of the Higgs boson trilinear self-coupling $\kappa_{\lambda}$ , and on the coupling of two Higgs bosons with two vector bosons $\kappa_{\text{VV}}$ . The observed (expected) allowed intervals of these coupling modifiers from this search at 95 $% \text{CL}$ are $-$ 37.7 $< \kappa_{\lambda} <$ 37.2 ( $-$ 30.1 $< \kappa_{\lambda} <$ 28.9) and $-$ 12.2 $< \kappa_{\text{VV}} <$ 13.5 ( $-$ 7.64 $< \kappa_{\text{VV}} <$ 8.90). In addition, a 95% CL upper limit is set at 43 (22) times the cross section of the $\text{pp}\to\text{VHH}$ process when $\kappa_{\lambda}=$ 5.5 and other couplings are set to standard model predictions.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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