Speaker
Description
We present a full one-loop study of charged scalar pair production in photon–photon collisions, γγ → H±H∓, within the Inert Doublet Model (IDM). This process provides a clean and sensitive probe of the extended scalar sector at future high-energy photon colliders.
We show that radiative corrections play a crucial role, significantly modifying the leading-order predictions. In particular, the size of the corrections is strongly correlated with the trilinear scalar coupling and the charged scalar mass. Depending on the collider energy and the parameter space, the corrections can range from moderate negative contributions to large positive enhancements, reaching up to about 60% at high energies.
Our analysis is performed under current theoretical and experimental constraints, including dark matter bounds, and several representative benchmark scenarios are proposed.
These results demonstrate that higher-order effects are essential for a reliable interpretation of charged scalar production and highlight γγ → H±H∓ as a promising channel to explore the IDM at future photon colliders.