Seminarium "High Energy, Cosmology and Astro-particle Physics (HECA)"

Simplified models of light new physics constitute an important benchmark for future experimental programs that require further dedicated theoretical efforts. It is understood that realistic such scenarios will likely involve other degrees of freedom, including heavy particles, which can introduce additional modes of detection. In this talk, we will focus on an example of such model, in which the dark sector couples to the SM via a popular light dark Higgs portal, while it also contains a secluded scalar dark matter (DM) candidate with mass above the TeV scale. We will illustrate interesting phenomenological features of such scenario that allow one to avoid stringent cosmological bounds, while at the same time lead to complementary probes in intensity frontier searches for light new physics, DM indirect detection (ID), and cosmic microwave background radiation surveys. We will also highlight possible non-local effects present in DM ID that could significantly affect relevant detection strategies for such models via, e.g., i) an additional contribution to the flux coming from the “diffusion from GC” effect, ii) linear fall-off in the long lifetime regime due to finite support of the dark matter density.
https://us02web.zoom.us/j/85478248551