Search for massive resonances decaying into WW , WZ , ZZ , q

Abstract

Results are presented from a search in the dijet final state for new massive narrow resonances decaying to pairs of W and Z bosons or to a W=Z boson and a quark. Results are based on data recorded in protonproton collisions at ffiffi ffi s p ¼ 13 TeV with the CMS detector at the CERN LHC. The data correspond to an integrated luminosity of 35.9 fb −1 . The mass range investigated extends upwards from 1.2 TeV. No excess is observed above the estimated standard model background and limits are set at 95% confidence level on cross sections, which are interpreted in terms of various models that predict gravitons, heavy spin-1 bosons, and excited quarks. In a heavy vector triplet model, W 0 and Z 0 resonances, with masses below 3.2 and 2.7 TeV, respectively, and spin-1 resonances with degenerate masses below 3.8 TeV are excluded at 95% confidence level. In the case of a singlet W 0 resonance masses between 3.3 and 3.6 TeV can be excluded additionally. Similarly, excited quark resonances, q à , decaying to qW and qZ with masses less than 5.0 and 4.7 TeV, respectively, are excluded. In a narrow-width bulk graviton model, upper limits are set on cross sections ranging from 0.6 fb for high resonance masses above 3.6 TeV, to 36.0 fb for low resonance masses of 1.3 TeV.

Improved bounds on W−W′ mixing with ATLAS resonant WZ production data at the LHC at Serenkova1, Osland2, Панков3 2019Phys. Rev. D92230View full textAdd to dashboardCite

“…One should also note that in this paper, for the sake of compactness of the graphic material, we limited ourselves to an analysis of experimental data from the ATLAS detector only. Our further analysis shows that the corresponding CMS data [53,57,58] yields bounds on the mixing parameter ξ and the W boson mass that agree with the results based on the ATLAS data.…”

Search for a W′ boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state

“…In the case of a highly boosted Higgs boson in the bb decay mode, the decay products tend to merge into a jet that has a mass consistent with a Higgs boson and that contains two b hadrons clustered into the jet. Once again, the soft drop algorithm is used to provide the variable m H SD as a measure of the Higgs boson jet mass, but in this case the jet is scaled using a simulationderived correction suitable for resonances below the top jet tagging mass window [44], which is p T and η dependent but results in a 5-10% mass amplification in both data and MC. Scale factors are used for the jet mass scale and resolution, which are derived from a fit to the distribution of the W boson jet m H SD spectrum in a sample enriched in semileptonic tt production using the technique outlined in Ref.…”

The minimal stealth boson: models and benchmarks

“…These tools allow to distinguish jets originating from boosted hadronically-decaying bosons and top quarks from the Standard Model (SM) background, composed mainly by quark and gluon jets produced in QCD processes. In this way, searches for diboson [18][19][20][21][22][23][24], tt [25] and tb [26,27] resonances in purely hadronic channels have been performed, with a sensitivity that turns out to be competitive with channels involving leptons in the final state. Nevertheless, these searches are insensitive to heavy resonances decaying into more complex hadronic final states, giving rise to multi-pronged jets.…”