Palestrante
Descrição
In this work, we explore the parameter space of the Oscillating Asymmetric Dark Matter (OADM) model, with a dark matter particle whose mass lies in the sub-GeV region. The OADM model proposes a new approach to the core-cusp problem in order to resolve the tension between the predictions of the ΛCDM model and the observations of dark matter profiles in dwarf spheroidal galaxies. A new mechanism is presented for converting cusp-type profiles into core-type profiles by reactivating dark matter annihilation in galaxies during the structure formation period. This reactivation can occur provided there is a small mass term that violates the conservation of the number of dark matter particles, causing oscillations between dark matter and its antiparticle. To constrain the parameter space of the model, we analyzed the effects of the annihilation mechanism on the rotation curves of galaxies, performing a combined fit for two different survey catalogs: SPARC and Little Things. Thus, we were able to find a relation between the DM particle’s mass and the interaction cross-section of the model.
