# Searching for a charged Higgs boson with both *H*^{±}*W*^{∓}*Z* and *H*^{±}*tb* couplings at the LHC

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## Abstract

In certain new physics scenarios, a singly charged Higgs boson can couple to both fermions and *W*^{±}*Z* at tree level. We develop new strategies beyond current experimental searches using *pp* → *jjH*^{±}, *H*^{±} → *tb* at the Large Hadron Collider (LHC). With the effective *H*^{±}*W*^{∓}*Z* and *H*^{±}*tb* couplings we perform a model-independent analysis at the collision energy \( \sqrt{s}=13 \) TeV with the integrated luminosity of 3 ab^{−1}. We derive the discovery prospects and exclusion limits for the charged Higgs boson in the mass range from 200 GeV to 1 TeV. With |*F*_{WZ}|*,* |*A*_{t}| ∼ 0*.*5–1*.*0 and 300 GeV ≲ \( {m}_{H^{\pm }} \) ≲ 400 GeV, we point out that a discovery significance of 5*σ* can be achieved. The constraints and projected sensitivities are also discussed in a realistic model, i.e., the modified Georgi-Machacek model without custodial symmetry. Our proposed search would provide direct evidence for a charged Higgs boson *H*^{±} that couples to *W*^{±}*Z* and *tb*, and has better sensitivity to the couplings of *H*^{±}*W*^{∓}*Z* and *H*^{±}*tb* than current searches.

## Keywords

Hadron-Hadron scattering (experiments) Higgs physics## Notes

### **Open Access**

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