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• W4225512253 abstract "A bstract A search for new heavy resonances decaying to a pair of Higgs bosons (HH) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. Data were collected with the CMS detector at the LHC in 2016–2018, corresponding to an integrated luminosity of 138 fb − 1 . Resonances with a mass between 0.8 and 4.5 TeV are considered using events in which one Higgs boson decays into a bottom quark pair and the other into final states with either one or two charged leptons. Specifically, the single-lepton decay channel $$ mathrm{HH}to mathrm{b}overline{mathrm{b}}{mathrm{WW}}^{ast}to mathrm{b}overline{mathrm{b}}ell vmathrm{q}{overline{mathrm{q}}}^{prime } $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>HH</mml:mi> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:msup> <mml:mi>WW</mml:mi> <mml:mo>∗</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>ℓ</mml:mi> <mml:mi>v</mml:mi> <mml:mi>q</mml:mi> <mml:msup> <mml:mover> <mml:mi>q</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>′</mml:mo> </mml:msup> </mml:math> and the dilepton decay channels $$ mathrm{HH}to mathrm{b}overline{mathrm{b}}{mathrm{WW}}^{ast}to mathrm{b}overline{mathrm{b}}ell vell v $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>HH</mml:mi> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:msup> <mml:mi>WW</mml:mi> <mml:mo>∗</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>ℓ</mml:mi> <mml:mi>v</mml:mi> <mml:mi>ℓ</mml:mi> <mml:mi>v</mml:mi> </mml:math> and $$ mathrm{HH}to mathrm{b}overline{mathrm{b}}uptau uptau to mathrm{b}overline{mathrm{b}}ell vvell vv $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>HH</mml:mi> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>ττ</mml:mi> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>ℓ</mml:mi> <mml:mi>vv</mml:mi> <mml:mi>ℓ</mml:mi> <mml:mi>vv</mml:mi> </mml:math> are examined, where ℓ in the final state corresponds to an electron or muon. The signal is extracted using a two-dimensional maximum likelihood fit of the $$ mathrm{H}to mathrm{b}overline{mathrm{b}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>H</mml:mi> <mml:mo>→</mml:mo> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> jet mass and HH invariant mass distributions. No significant excess above the standard model expectation is observed in data. Model-independent exclusion limits are placed on the product of the cross section and branching fraction for narrow spin-0 and spin-2 massive bosons decaying to HH. The results are also interpreted in the context of radion and bulk graviton production in models with a warped extra spatial dimension. The results provide the most stringent limits to date for X → HH signatures with final-state leptons and at some masses provide the most sensitive limits of all X → HH searches." @default.
• W4225512253 created "2022-05-05" @default.
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