Search for charged Higgs bosons decaying into a top and a bottom quark in the all-jet final state of pp collisions at s
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Received: January 21, 2020 Accepted: June 24, 2020 Published: July 20, 2020
The CMS collaboration E-mail: [email protected] Abstract: A search for charged Higgs bosons (H± ) decaying into a top and a bottom quark in the all-jet final state is presented. The analysis uses LHC proton-proton collision data √ recorded with the CMS detector in 2016 at s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1 . No significant excess is observed above the expected background. Model-independent upper limits at 95% confidence level are set on the product of the H± production cross section and branching fraction in two scenarios. For production in association with a top quark, limits of 21.3 to 0.007 pb are obtained for H± masses in the range of 0.2 to 3 TeV. Combining this with a search in leptonic final states results in improved limits of 9.25 to 0.005 pb. The complementary s-channel production of an H± is investigated in the mass range of 0.8 to 3 TeV and the corresponding upper limits are 4.5 to 0.023 pb. These results are interpreted using different minimal supersymmetric extensions of the standard model. Keywords: Beyond Standard Model, Hadron-Hadron scattering (experiments), Higgs physics ArXiv ePrint: 2001.07763
Open Access, Copyright CERN, for the benefit of the CMS Collaboration. 3 Article funded by SCOAP .
https://doi.org/10.1007/JHEP07(2020)126
JHEP07(2020)126
Search for charged Higgs bosons decaying into a top and a bottom quark in the all-jet final state of pp √ collisions at s = 13 TeV
Contents 1
2 The CMS detector
3
3 Event samples and simulation
3
4 Object reconstruction
4
5 Search strategy 5.1 Event categories in the boosted analysis 5.2 Event selection in the resolved analysis
5 6 7
6 Backgrounds 6.1 Background estimations in events with boosted W boson and top quark candidates 6.2 Background estimations in events with resolved top quarks
9 9 10
7 Systematic uncertainties
11
8 Results and interpretation
12
9 Combination with the leptonic final states
16
10 Summary
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The CMS collaboration
28
1
Introduction
The observation of a Higgs boson [1–5] has motivated new areas of study at the CERN LHC, including precision measurements of its interactions with standard model (SM) particles [6– 8], searches for decays to new particles, and studies of the Higgs boson self interactions. Often, models beyond the SM contain an extended Higgs sector. Minimal extensions known as two Higgs doublet models (2HDMs) [9–12] include a second complex Higgs doublet that leads to five physical particles: two charged Higgs bosons, H ± , two neutral scalars, h and H, and one neutral pseudoscalar, A. The 2HDMs are further classified according to the couplings of the doublets to fermions. One of the popular 2HDMs is the minimal supersymmetric standard model (MSSM) [13, 14] where one doublet couples to up quarks and the other to down quarks and charged leptons (Type-II 2HDM). In these models, the lightest CP-even Higgs boson can align with the properties of the SM, w
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