A search is reported for pairs of light Higgs bosons (
The possibility in supersymmetric scenarios that the dark matter candidate is a Higgsino-like neutralino means that its production can be associated with Higgs bosons. Taking advantage of this fact, we propose a LHC search strategy for gluinos with
- Award ID(s):
- 2112540
- NSF-PAR ID:
- 10377869
- Publisher / Repository:
- Springer Science + Business Media
- Date Published:
- Journal Name:
- The European Physical Journal C
- Volume:
- 82
- Issue:
- 10
- ISSN:
- 1434-6052
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Abstract ) produced in supersymmetric cascade decays in final states with small missing transverse momentum. A data set of LHC$${\textrm{H}} _1$$ collisions collected with the CMS detector at$$\hbox {pp}$$ and corresponding to an integrated luminosity of 138$$\sqrt{s}=13\,\text {TeV} $$ is used. The search targets events where both$$\,\text {fb}^{-1}$$ bosons decay into Equation missing<#comment/>pairs that are reconstructed as large-radius jets using substructure techniques. No evidence is found for an excess of events beyond the background expectations of the standard model (SM). Results from the search are interpreted in the next-to-minimal supersymmetric extension of the SM, where a “singlino” of small mass leads to squark and gluino cascade decays that can predominantly end in a highly Lorentz-boosted singlet-like$${\textrm{H}} _1$$ and a singlino-like neutralino of small transverse momentum. Upper limits are set on the product of the squark or gluino pair production cross section and the square of the Equation missing<#comment/>branching fraction of the$${\textrm{H}} _1$$ in a benchmark model containing almost mass-degenerate gluinos and light-flavour squarks. Under the assumption of an SM-like Equation missing<#comment/>branching fraction,$${\textrm{H}} _1$$ bosons with masses in the range 40–120$${\textrm{H}} _1$$ arising from the decays of squarks or gluinos with a mass of 1200–2500$$\,\text {GeV}$$ are excluded at 95% confidence level.$$\,\text {GeV}$$ -
Abstract This paper reports a search for Higgs boson pair (
hh ) production in association with a vector boson ( ) using 139 fb$$W\; {\text {o}r}\; Z$$ of proton–proton collision data at$$^{-1}$$ recorded with the ATLAS detector at the Large Hadron Collider. The search is performed in final states in which the vector boson decays leptonically ($$\sqrt{s}=13\,\text {TeV}$$ with$$W\rightarrow \ell \nu ,\, Z\rightarrow \ell \ell ,\nu \nu $$ ) and the Higgs bosons each decay into a pair of$$\ell =e, \mu $$ b -quarks. It targetsVhh signals from both non-resonanthh production, present in the Standard Model (SM), and resonanthh production, as predicted in some SM extensions. A 95% confidence-level upper limit of 183 (87) times the SM cross-section is observed (expected) for non-resonantVhh production when assuming the kinematics are as expected in the SM. Constraints are also placed on Higgs boson coupling modifiers. For the resonant search, upper limits on the production cross-sections are derived for two specific models: one is the production of a vector boson along with a neutral heavy scalar resonanceH , in the mass range 260–1000 GeV, that decays intohh , and the other is the production of a heavier neutral pseudoscalar resonanceA that decays into aZ boson andH boson, where theA boson mass is 360–800 GeV and theH boson mass is 260–400 GeV. Constraints are also derived in the parameter space of two-Higgs-doublet models. -
Abstract Measurements of Higgs boson production, where the Higgs boson decays into a pair of
leptons, are presented, using a sample of proton-proton collisions collected with the CMS experiment at a center-of-mass energy of Equation missing<#comment/>, corresponding to an integrated luminosity of 138$$\uptau $$ . Three analyses are presented. Two are targeting Higgs boson production via gluon fusion and vector boson fusion: a neural network based analysis and an analysis based on an event categorization optimized on the ratio of signal over background events. These are complemented by an analysis targeting vector boson associated Higgs boson production. Results are presented in the form of signal strengths relative to the standard model predictions and products of cross sections and branching fraction to$$\,\text {fb}^{-1}$$ leptons, in up to 16 different kinematic regions. For the simultaneous measurements of the neural network based analysis and the analysis targeting vector boson associated Higgs boson production signal strengths are found to be$$\uptau $$ for inclusive Higgs boson production,$$0.82\pm 0.11$$ ($$0.67\pm 0.19$$ ) for the production mainly via gluon fusion (vector boson fusion), and$$0.81\pm 0.17$$ for vector boson associated Higgs boson production.$$1.79\pm 0.45$$ -
Abstract A search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has been performed using proton-proton collision data collected at
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A bstract Three searches are presented for signatures of physics beyond the standard model (SM) in
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