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Explore a detailed physics seminar examining the Callan Rubakov Effect and its implications for 4D gauge theory, presented by T Daniel Brennan from UCSD. Delve into the complex interaction between massless fermions and smooth monopoles, focusing on how fermions can probe ultraviolet physics within monopole cores. Learn about the significant implications of this effect, including potential proton decay in Grand Unified Theory models. Understand the challenges surrounding monopole-fermion scattering and discover a novel physical mechanism proposed to resolve the longstanding confusion about out-states that appear to exist outside the perturbative Hilbert space.
