Speaker
Description
Inelastically coupled dark matter has the well-known advantage of evading direct detection bounds, given a sufficient mass splitting $\Delta$ between 2 dark states, $\chi_1, \chi_0$. One of the simplest couplings one can add to the standard model (with no additional dark states) are the non-renormalizable dipole operators, where $\chi_0,\chi_1$ inelastically couple to the SM photon. This minimal model gives the interesting monophoton decay signature of $\chi_1\rightarrow\chi_0 \gamma$. Furthermore, relic abundance can be achieved via freeze out through t(s)-channel (co-)annihilation. In this talk, I discuss this model, bounds constraining the coupling and mass splittings at existing experiments, and demonstrate FASER's ability to rule out unprobed regions of interesting parameter space.
