Exotic Higgs decay via charged Higgs

Tong Li, Shufang Su

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12 Citations (Scopus)


Abstract: The most common search channel for heavy neutral Higgses in models with an extension of the Standard Model Higgs sector is A/H0 → ττ , which becomes ineffective when new decay modes of A/H0 open. In this paper, we analyzed two such channels involving charged Higgses in the final states: A/H0 → W±H and H0 → H+H. With the consequent decay of H± → τν, we found that the limits for σ × BR(gg → A/H0 → W±H) × BR(H± → τν) vary from 30 to 10fb for mA/H 0 between 300 and 1000GeV for 95% C.L. exclusion, and about 80 to 30 fb for 5σ discovery. For H+H mode, 95% C.L. limits on σ × BR(gg → H0 → H+H) × BR2(H± → τν) vary from 9 to 4 fb for mH 0 between 400 and 1000 GeV, while the 5σ reach is about 20 to 10 fb. We further interpret the cross section limits in the Type II 2HDM parameter space. While A → W±H offers great sensitivity in both sin(β − α) versus tan β and mA versus tan β parameter space, H0 → H+H can cover most of the parameter space for H0. Reach in H0 → W±H is more limited, especially for mH 0> 2mH±. It is, however, complementary to H0 → H+H when BR(H0 → H+H) is accidentally suppressed.
Original languageEnglish
Article number68
Pages (from-to)1-19
Number of pages19
JournalJournal of High Energy Physics
Issue number11
Publication statusPublished - 2015


  • Beyond Standard Model
  • Higgs Physics

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