Speaker
Description
Experimental limits on relativistic magnetic monopoles (MMs) are conventionally quoted as functions of detector velocity, leaving the astrophysically relevant quantity — MM mass — only loosely constrained, since the acceleration MMs undergo in cosmic magnetic fields has been treated as a free parameter. We close this gap by explicitly computing the MM velocity as a function of mass, combining acceleration in Galactic and intergalactic magnetic fields with energy losses along the path to Earth. This mapping shows Galactic fields alone accelerate MMs with m ≲ 10¹² GeV to relativistic speeds, with intergalactic fields extending the reach to m ~ 10¹⁴ GeV under favorable conditions. Using this framework, we recast velocity-dependent limits from MACRO, IceCube, and the Pierre Auger Observatory — plus a CTAO forecast — into mass-dependent flux limits, and compare them to the Parker bound, cosmic abundance bound, and MoEDAL. The result is a unified mass-scale picture of MM sensitivity, and a route by which future flux and energy measurements could in turn probe intergalactic magnetic fields.
