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Theory Seminars (High Energy/Cosmology)

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Events During the Week of April 21st through April 28th, 2019

Monday, April 22nd, 2019

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Tuesday, April 23rd, 2019

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Wednesday, April 24th, 2019

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Thursday, April 25th, 2019

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Friday, April 26th, 2019

Systematic expansion of tunneling rates
Time: 2:00 pm
Place: 5280 Chamberlin Hall
Speaker: Björn Garbrecht, Technical University Munich
Abstract: I will review the theory of tunneling in quantum mechanics and field theory to one-loop order. Then, I will address how to systematically go beyond this approximation in an expansion based on Green's functions. One phenomenological relevance of this is that a consistent calculation of the tunneling rate in the Standard Model and beyond requires a one-loop resummation. Finally, the standard Euclideanized calculation of tunneling rates is related to a derivation based on real-time amplitudes.
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