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With the discovery of the Higgs boson at the Large Hadron Collider, exploring the thermal history associated with electroweak symmetry-breaking (EWSB) has taken on heightened interest. In particular, the process of EWSB in the early Universe – the electroweak phase transition – would provide conditions amenable to explaining the observed cosmic matter-antimatter asymmetry, if the transition were of first order and sufficiently strong. The prospects for resonant di-Higgs production searches at LHC, in the context of probing the electroweak phase transition will be presented. Limits on the resonant diHiggs production cross section times branching fraction have been produced, assuming a search at the Compact Muon Solenoid experiment in the bbWW channel. It has been assumed an integrated luminosity of 300 fb−1, expected to be collected by end of Run2 data-taking foreseen for 2022.

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