Search for massive WH resonances decaying into the ℓνbb¯¯¯ final state at s√=8 TeV

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Issue Date
2016-04-28Author
CMS Collaboration
Publisher
Springer Verlag
Type
Article
Article Version
Scholarly/refereed, publisher version
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This is an open access article under the terms of the Creative Commons Attribution License 4.0 (CC BY4.0).
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A search for a massive resonance W′decaying into a W and a Higgs boson in the ℓνbb¯¯¯ (ℓ=e, μ) final state is presented. Results are based on data corresponding to an integrated luminosity of 19.7fb−1 of proton–proton collisions at s√=8 TeV, collected using the CMS detector at the LHC. For a high-mass (≳1 TeV) resonance, the two bottom quarks coming from the Higgs boson decay are reconstructed as a single jet, which can be tagged by placing requirements on its substructure and flavour. Exclusion limits at 95 % confidence level are set on the production cross section of a narrow resonance decaying into WH, as a function of its mass. In the context of a little Higgs model, a lower limit on the W′ mass of 1.4 TeV is set. In a heavy vector triplet model that mimics the properties of composite Higgs models, a lower limit on the W′ mass of 1.5 TeV is set. In the context of this model, the results are combined with related searches to obtain a lower limit on the W′ mass of 1.8 TeV, the most restrictive to date for decays to a pair of standard model bosons.
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Citation
Khachatryan, V., Sirunyan, A.M., Tumasyan, A. et al. Eur. Phys. J. C (2016) 76: 237. https://doi.org/10.1140/epjc/s10052-016-4067-z
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