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arXiv · 1403.7541

One-loop decays ${A^0} \to ZZ, Zγ, γγ$ within the 2HDM and its search at the LHC

J. L. Diaz-Cruz·C. G. Honorato·J. A. Orduz-Ducuara·M. A. Perez
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Abstract

The general two-higgs doublet model (2HDM) contains a rich spectrum of neutral and charged Higgs bosons, whose detection would be a clear signal of new physics. When the Higgs potential is CP-conserving, the spectrum includes a pseudoscalar mass eigenstate $A^{0}$, which does not couple to vector bosons at tree-level. However, fermionic loops (top and bottom mainly) induce the coupling $AVV'$ (with $V,V'=γ, Z$) at higher orders. We evaluate the amplitude for the decays ${A^0} \to ZZ, Zγ, γγ$, including a generic fermionic loop contribution, and present results on the branching ratios for 2HDM-I,II and III. Current LHC searches on heavy Higgs bosons are used as an estimate to constrain the allowed mass range for $A^0$.

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J. L. Diaz-Cruz, C. G. Honorato, J. A. Orduz-Ducuara, M. A. Perez. 2014-11-19. One-loop decays ${A^0} \to ZZ, Zγ, γγ$ within the 2HDM and its search at the LHC. https://doi.org/10.1103/physrevd.90.095019

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