$Z_H\to H^0\gamma$ decay within the littlest Higgs model at $\mathcal{O}({\alpha }_{\mathrm{ew}}^3{\alpha }_s)$ accuracy

Ming-Ming Long, Shao-Ming Wang, Qiang Yang +3

We study the rare decay $Z_H\to H^0\gamma$ at $\mathcal{O}({\alpha }_{\mathrm{ew}}^3{\alpha }_s)$ accuracy including two-loop QCD corrections in the context of the littlest Higgs model (LHM) wit…