Resonant di-Higgs boson production in the bb¯WW channel: Probing the electroweak phase transition at the LHC

We analyze the prospects for resonant di-Higgs production searches at the LHC in the bb¯W+W− (W+→ℓ+νℓ, W−→ℓ−ν¯ℓ) channel, as a probe of the nature of the electroweak phase transition in Higgs portal extensions of the Standard Model. In order to maximize the sensitivity in this final state, we develo...

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Bibliographic Details
Published in:Physical review. D 2017-08, Vol.96 (3)
Main Authors: Huang, T, No, J M, Pernié, L, Ramsey-Musolf, M, Safonov, A, Spannowsky, M, Winslow, P
Format: Article
Language:English
Subjects:
Electroweak model
Higgs bosons
Large Hadron Collider
Luminosity
Neutrinos
Phase transitions
Quarks
Reconstruction
Sensitivity
Solenoids
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Summary:We analyze the prospects for resonant di-Higgs production searches at the LHC in the bb¯W+W− (W+→ℓ+νℓ, W−→ℓ−ν¯ℓ) channel, as a probe of the nature of the electroweak phase transition in Higgs portal extensions of the Standard Model. In order to maximize the sensitivity in this final state, we develop a new algorithm for the reconstruction of the bb¯W+W− invariant mass in the presence of neutrinos from the W decays, building from a technique developed for the reconstruction of resonances decaying to τ+τ− pairs. We show that resonant di-Higgs production in the bb¯W+W− channel could be a competitive probe of the electroweak phase transition already with the data sets to be collected by the CMS and ATLAS experiments in run 2 of the LHC. The increase in sensitivity with larger amounts of data accumulated during the high-luminosity LHC phase can be sufficient to enable a potential discovery of the resonant di-Higgs production in this channel.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.96.035007