Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

Abstract : A search for heavy resonances decaying to a Higgs boson and a vector boson is presented. The analysis is performed using data samples collected in 2015 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to integrated luminosities of 2.2-2.5 inverse femtobarns. The search is performed in channels in which the vector boson decays into leptonic final states (Z to nu , W to l nu , and Z to l l, with l = e, mu), while the Higgs boson decays to collimated b quark pairs detected as a single massive jet. The discriminating power of a jet mass requirement and a b jet tagging algorithm are exploited to suppress the standard model backgrounds. The event yields observed in data are consistent with the background expectation. In the context of a theoretical model with a heavy vector triplet, a resonance with mass less than 2 TeV is excluded at 95% confidence level. The results are also interpreted in terms of limits on the parameters of the model, improving on the reach of previous searches.
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Submitted on : Thursday, October 27, 2016 - 7:08:18 AM
Last modification on : Wednesday, November 13, 2019 - 3:38:23 PM

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V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks. Physics Letters B, Elsevier, 2017, 768, pp.137-162. ⟨10.1016/j.physletb.2017.02.040⟩. ⟨in2p3-01388428⟩

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