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Caltech

High Energy Physics Seminar

Monday, November 1, 2021
12:00pm to 1:00pm
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Online Event
Rethinking false vacuum decay
Djuna Croon, Durham University,

Future gravitational wave interferometers may provide the first direct probe of the first second of our Universe. A first order phase transition in the early Universe would have sourced a stochastic gravitational wave background (SGWB). However, existing methods used to predict this SGWB are limited to weakly-coupled theories and plagued by large uncertainties. In this talk, I will motivate that these obstacles can be overcome through an alternate definition of the action for local regions of field space, which has a natural implementation in the functional renormalization group. Importantly, this method allows for more reliable predictions for strongly interacting theories. I will demonstrate how this works in a toy model example, and sketch the way towards accurate gravitational phenomenology and other

Send email to: [email protected] for Zoom information.