[CANCELLED] Screening of fifth forces in scalar tensor theories

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• Clare Burrage, University of Nottingham
• Wednesday 02 December 2020, 14:15-15:15
• ONLINE - Details to be sent by email.

If you have a question about this talk, please contact Scott Melville.

Scalar tensor theories are of interest as possible explanations for the acceleration of the expansion of the universe, and also as a way to understand possible modifications of gravity. However, it is always necessary to explain why, if such a theory describes our universe, a scalar mediated fifth force has not been seen. I will discuss two possible explanations for this: (1) that the underlying physical theory is scale invariant and (2) that non-linearities in the theory act to suppress, or ‘screen’ the fifth force. I will focus, in particular, on the challenges encounter when trying to embed these mechanisms in effective field theories.

This talk is part of the Wednesday HEP-GR Colloquium series.

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