Speaker
Description
Magnetic monopoles remain a compelling target in searches for physics beyond the Standard Model. In this talk, we discuss the cosmological consequences of a population of monopoles that is accelerated by galactic magnetic fields and, as a result, stops behaving like ordinary clustered cold dark matter.
We describe this process using a generic accelerating dark matter framework, in which a monopole subcomponent gains kinetic energy at late times. The resulting reduction of the clustered matter component modifies the growth of structure and leaves signatures in cosmological observables across linear and mildly nonlinear scales. We combine CMB and BAO data, including Planck and DESI, with small-scale structure probes such as the Lyman-alpha forest and weak gravitational lensing to constrain the allowed monopole contribution to dark matter. Recasting these limits in the monopole mass-flux plane allows us to derive new constraints at large masses, between $10^{12}$ and $10^{17}\,\mathrm{GeV}$, in a region not yet directly probed by present experiments or existing indirect bounds.
