Research Papers in Physics and Astronomy
Search for new particles in an extended Higgs sector with four bquarks in the final state at √s=13TeV
Date of this Version
Physics Letters B 835 (2022) 137566. https://doi.org/10.1016/j.physletb.2022.137566
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 100GeVand mX from 1 to 3TeV. 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=13 TeV, 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)as a function of the resonances’ masses, where both the X→φφ and φ→ b branching fractions are assumed to be 100%. These limits are the first of their kind on this process, ranging between 30 and 1fb at 95% confidence level for the considered mass ranges.