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

Huang, T. and No, J. M. and Pernié, L. and Ramsey-Musolf, M. and Safonov, A. and Spannowsky, M. and Winslow, P. (2017) 'Resonant di-Higgs boson production in the bb¯WW channel : probing the electroweak phase transition at the LHC.', Physical review D., 96 (3). 035007.


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 datasets 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.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 96, 035007 © 2017 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:05 February 2017
Date deposited:30 August 2017
Date of first online publication:11 August 2017
Date first made open access:30 August 2017

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