Search for new particles in an extended Higgs sector with four b quarks in the final state at √{ s } = 13TeV
Abstract
A search for a massive resonance X decaying to a pair of spin-0 bosons ϕ that themselves decay to pairs of bottom quarks, is presented. The analysis is restricted to the mass ranges mϕ from 25 to 100 GeV and mX from 1 to 3 TeV. For these mass ranges, the decay products of each ϕ boson are expected to merge into a single large-radius jet. Jet substructure and flavor identification techniques are used to identify these jets. The search is based on CERN LHC proton-proton collision data at √{ s } = 13TeV, collected with the CMS detector in 2016-2018, corresponding to an integrated luminosity of 138fb-1. Model-specific limits, where the two new particles arise from an extended Higgs sector, are set on the product of the production cross section and branching fraction for X → ϕϕ → (b b ‾) (b b ‾) as a function of the resonances' masses, where both the X → ϕϕ and ϕ → b b ‾ branching fractions are assumed to be 100%. These limits are the first of their kind on this process, ranging between 30 and 1 fb at 95% confidence level for the considered mass ranges.
- Publication:
-
Physics Letters B
- Pub Date:
- December 2022
- DOI:
- 10.1016/j.physletb.2022.137566
- Bibcode:
- 2022PhLB..83537566T
- Keywords:
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- CMS;
- Higgs;
- BSM;
- 2HDM