Speaker
Description
In regions of the landscape with a tower of light electrically charged particles or branes -- those with charge-to-mass (or tension) ratio parametrically larger than 1 in Planck units -- one also finds a tower of light magnetically charged particles or branes with the same charge-to-mass ratio. We call this phenomenon "electric-magnetic co-scaling." These towers are, furthermore, aligned; their charge-to-mass ratio vectors point in the same direction, as measured by the kinetic terms of the gauge fields. I will discuss examples and heuristic reasons for this to be true, and comment on phenomenological applications, including an upper bound on the quantum gravity cutoff in theories of extra-dimensional axions. (Based on 2406.08543 and work in progress with Tom Rudelius and Christopher Tudball.)
