Orateur
Description
James Webb Space Telescope (JWST) has revealed a surprisingly high number of UV-bright galaxies at $z \geq 10$. The UV luminosity function at these high redshifts is an excellent probe for studying structure formation on small scales and at high redshifts. Dark matter (DM) and baryon interactions have been tested through direct detection experiments, as well as astrophysical and cosmological observations. DM-baryon interactions will affect both the Cosmic Microwave Background (CMB) and the matter power spectrum (MPS). As the baryons are tightly coupled to the photons, they perceive the radiation pressure. As a result, an interaction between the DM and baryon can transfer the pressure from the baryons to the DM, which impedes the clustering of the DM, and consequently the structure formation at various scales. Depending on the interaction strength, this can suppress the matter power spectrum at nonlinear scales. As JWST is observing structure formation at small scales by observing high redshift galaxies, we aim to use these observations as a new probe of DM-baryon interactions. Changes in the power spectrum aided by these interactions will influence the halo mass function, which characterizes the distribution of dark matter halo masses. We will probe the underlying particle physics parameter and test the viability of this model. Our work highlights the potential of JWST as a powerful tool for providing insights into cosmic structures and offering a pathway to novel discoveries in the Beyond the Standard Model (BSM) sector.
