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arXiv · 1809.09127

Searching for the $W \gamma$ decay of a charged Higgs boson

Heather E. Logan·Yongcheng Wu
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Abstract

We study the prospects for charged Higgs boson searches in the $W \gamma$ decay channel. This loop-induced decay channel can be important if the charged Higgs is fermiophobic, particularly when its mass is below the $WZ$ threshold. We identify useful kinematic observables and evaluate the future Large Hadron Collider sensitivity to this channel using the custodial-fiveplet charged Higgs in the Georgi-Machacek model as a fermiophobic benchmark. We show that the LHC with 300~fb$^{-1}$ of data at 14~TeV will be able to exclude charged Higgs masses below about 130~GeV for almost any value of the SU(2)$_L$-triplet vacuum expectation value in the model, and masses up to 200~GeV and beyond when the triplet vacuum expectation value is very small. We describe the signal simulation tools created for this analysis, which have been made publicly available.

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Heather E. Logan, Yongcheng Wu. 2018-09-24. Searching for the $W \gamma$ decay of a charged Higgs boson. https://doi.org/10.1007/jhep11(2018)121

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