Speaker
Description
We introduce a neutrino-scalar dark matter (DM) ν-ϕ interaction and consider Diffuse Supernova Neutrino Background (DSNB) and Active Galactic Nuclei (AGN) representing distinctive neutrino sources. We focus on interaction mediated by a heavy fermionic particle F and investigate the attenuation of neutrino fluxes from these sources. We model the unscattered neutrino flux from DSNB via core-collapse supernova (CCSN) and star-formation rate (SFR), then use the DUNE experiment to set limits on DM-neutrino interaction. For AGNs, NGC 1068 and TXS 0506+056 where the neutrino carries energy above TeV, we select the kinematic region m^2_F ≫ E_ν m_ϕ ≫ m^2_ϕ such that the νϕ scattering cross section features an enhancement at high energy. We investigate the constraint on m_ϕ and scattering cross section by including DM density spikes at center of AGNs and computing the neutrino flux at IceCube, where the ϕϕ∗ annihilation cross section is implemented to obtain the saturation density of the spikes.
