Comprehensive study of two Higgs doublet models in light of the new boson with mass around 125 GeV

Sanghyeon Chang, Sin Kyu Kang, Jong Phil Lee, Kang Young Lee, Seong Chan Park, Jeonghyeon Song

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


A new boson of mass roughly 125 GeV has been recently reported by the ATLAS and CMS collaborations. Although its signals in various decay modes resemble those of the standard model (SM) Higgs boson, observed are the combinations of entangled information about the production, decay rates and total decay width of the new boson. In addition, some decay channels show non-negligible deviation from the SM expectation, such as the 2σ excess in the diphoton channel. In the four types (I, II, X and Y) of two Higgs doublet models, we perform the global χ 2 fit in three scenarios: (i) the new boson is the light CP-even Higgs boson h 0; (ii) it is the heavy CP-even Higgs boson H 0; (iii) the signals are from the degenerate state of h 0 and the pseudoscalar A 0. Considering other phenomenological constraints such as flavor physics, electroweak precision data, and the LEP search for the Higgs boson, we find that the first scenarios in Type II provides the best fit. And the other models are also as good as the SM in explaining the LHC Higgs data.

Original languageEnglish
Article number75
JournalJournal of High Energy Physics
Issue number5
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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