Combination of searches for Higgs boson pairs in pp collisions at s=13TeV with the ATLAS detector

Higgs bosons with large couplings to light quarks

“…Finally, for simplicity and as in the previous sections, we take the Higgs potential parameters λ 4 = λ 5 = 0. This Finally, for large κ d , κ s and non-zero mixing, there is a significant contribution to SM Higgs pair production via quark fusion production of heavy Higgs states decaying to two SM Higgses, which may be already constrained by current di-Higgs measurements [110,111].…”

The Higgs-portal for vector dark matter and the effective field theory approach: A reappraisal

“…Refs. [46][47][48][49][50] with the exception of the ones into H 2 → ZZ which can still constrain 130 M H 2 200 GeV for low decay branching fraction of H 2 into DM [51]. The latter constraintq have, however, a negligible impact on our results.…”

Exploring anomalous couplings in Higgs boson pair production through shape analysis

“…Deviations from this form could provide strong hints about how to extend the SM. The trilinear Higgs boson coupling λ can be constrained by measurements of Higgs boson pair production [1,2], where the gluon fusion channel yields the largest cross section, and the most stringent 95% CL limits on the total gg → HH cross section at √ s = 13 TeV are currently σ HH max = 6.9 × σ SM , constraining trilinear coupling modifications to the range −5.0 ≤ λ/λ SM ≤ 12.0 [1]. The trilinear Higgs couplings can also be constrained in an indirect way, through measurements of processes which are sensitive to these couplings via electroweak corrections [3][4][5][6][7][8][9][10][11][12][13][14].…”

“…The areas outside the silver and white curves are regions where the total cross section exceeds 6.9 × σ SM and 22.2 × σ SM , respectively. These values are motivated by the current ATLAS/CMS limits at √ s = 13 TeV[1,2]. The red areas denote SM-like shapes.…”