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 |FWZ|, |At| ∼ 0.5–1.0 and 300 GeV ≲ {m}_{H^{pm }} ≲ 400 GeV, we point out that a discovery significance of 5σ 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.
Highlights
We derive the discovery prospects and exclusion limits for the charged Higgs boson in the mass range from
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
If the custodial symmetry is broken explicitly the mixing angle δ can be sizable.√We will work in the modified GM (MGM) model with the working hypothesis vξ = vχ/ 2
Summary
“HP500” and “ttxj”, “twj”, “tqjj” denote the signal and backgrounds tt, tW , tq, respectively. Since in the signal process, t and b come from the decay of on-shell charged Higgs boson H±, the variable mtb can be used to suppress the backgrounds. PbT1min/max, pbT2min/max and mmtbin/max are the lower/upper bounds of pbT1, pbT2 and mtb, respectively. We show in table 2 the cut flow of the signal and background cross sections after each selection cut for mH± = 500 GeV with the benchmark scenario FW Z = At = 0.5. Ns = σsL and nb = σbL denote the number of events after cuts with the integrated luminosity of L, σs and σb are the cross sections of the signal and total background after cuts.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
