Decay $\varphi \to Z\gamma \gamma$ ($\varphi =h,H,A$) in the minimal supersymmetric standard model

Abstract

The decays of the CP-even ($h,H$) and the CP-odd ($A$) Higgs bosons $h,H,A\to Z\gamma \gamma$ are calculated in the context of the minimal supersymmetric standard model (MSSM), where they are induced at the one-loop level via box and reducible Feynman diagrams. For the numerical evaluation of the branching ratios we employ the decoupling limit and consider values for the MSSM parameters still consistent with the current experimental data. We consider a particular scenario for the radiative corrections to the Higgs boson masses, dubbed hMSSM, which leads to only two free parameters, namely $m_A$ and $\tan \beta$. We found that the branching ratio of the $CP$-odd Higgs boson decay $A\to Z\gamma \gamma$ can reach values up to $10^{-8}$ for $m_A=750$ GeV, which is three order of magnitude smaller than that of the $A\to \gamma \gamma$ channel. On the other hand, the branching ratio of the $H\to Z\gamma \gamma$ decay is of the order of $10^{-7}$ for large values of $m_H$ and small values of $\tan \beta$, which is comparable with the branching ratio of the $H\to Z\gamma$ channel. As far as the branching ratio of the SM-like Higgs boson decay $h\to Z\gamma \gamma$ is concerned, it is considerably suppressed, of the order of $10^{-11}$.

21 pages, 8 figures

References in corpus (11)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions
• The Higgs sector of the phenomenological MSSM in the light of the Higgs boson discovery
• Search for new phenomena in high-mass diphoton final states using 37 fb${}^{-1}$ of proton-proton collisions collected at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for direct pair production of a chargino and a neutralino decaying to the 125 GeV Higgs boson in $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS detector
• Study of MSSM heavy Higgs bosons decaying into charginos and neutralinos