Abstract.
We study the phenomenology of associated production of a vector boson with a pair of Higgs bosons (VHH at the High-Luminosity LHC (HL-LHC). Despite the low rate of this channel, the scaling of the cross section suggests a measurement could be a useful probe of modifications of the trilinear Higgs boson coupling and anomalous interactions in the gauge-Higgs sector. We focus on both WHH and ZHH production, using the leptonic ( \( W\rightarrow l \nu\), \( Z \rightarrow ll\), \( Z\rightarrow \nu \nu\) decay modes of the vector bosons and the \( HH \rightarrow 4b\) di-Higgs decay mode. We show that top pair backgrounds are problematic for the \( W\rightarrow l \nu\) and \( Z\rightarrow \nu \nu\) channels, leaving \( Z \rightarrow ll\) as the most promising decay mode. However, even for this channel, we find limited sensitivity due to a low signal rate. We discuss some potential avenues for improvement.
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Nordström, K., Papaefstathiou, A. VHH production at the high-luminosity LHC. Eur. Phys. J. Plus 134, 288 (2019). https://doi.org/10.1140/epjp/i2019-12614-2
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DOI: https://doi.org/10.1140/epjp/i2019-12614-2