23-25 November 2022
Europe/Madrid timezone

Constraints to the 2HDM soft breaking parameter $m_{12}$ in the di-photon Higgs decay

23 Nov 2022, 16:20


Facultad de Ciencia y Tecnología (UPV/EHU)
Física Teórica Física Teórica


Francisco Manuel Arco García (IFT UAM-CSIC)


Within the 2HDM, it is usual to impose a $Z2$ symmetry to avoid the presence of flavor-changing neutral currents in the model at the tree level. This symmetry can be softly broken by a term in the Lagrangian proportional to a new parameter $m_{12}$. This parameter introduces a new energy scale in the model and is only present in the scalar interactions of the 2HDM. We explore the possible sensitivity to this parameter $m_{12}$ from the di-photon decay of the SM-like Higgs boson. We conclude that, with the present data, this decay can set additional bounds on $m_{12}$ at the 95% CL while respecting the rest of the relevant constraints of the model. Furthermore, we also show that the new measurement of the $W$ boson mass has a lesser impact on the derived limits.

Primary authors

Francisco Manuel Arco García (IFT UAM-CSIC) Sven Heinemeyer (IFCA (CSIC)) Maria Jose Herrero (UAM-IFT)

Presentation Materials

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