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날짜 2024-03-27 16:00 
연사 T. Daniel Brennan (UCSD) 
장소 E6-2, #2502 
We are delighted to announce the upcoming High-Energy Theory Seminar by Dr. T. Daniel Brennan visiting us from UCSD. The seminar will take place today Wednesday (March 27) at 4PM at E6-2, #2502 and you are all invited to participate. 
 
Speaker: T. Daniel Brennan (UCSD)
Time: Today, March 27 (Wednesday), 4PM
Place: E6-2, #2502
 
 
Title: The Callan Rubakov Effect
 
Abstract: The Callan Rubakov Effect describes the interaction between (massless) fermions and a smooth monopole in 4d gauge theory. In this scenario, the fermions can probe the UV physics inside the monopole core which leads to interesting effects such as proton decay in GUT models. However, the monopole-fermion scattering appears to lead to out-states that are not in the perturbative Hilbert space. In this talk, we will review this issue and propose a new physical mechanism that resolves this long-standing confusion.
 
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