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SUMMARY:Centre colloquium - Claudia de Rham (Imperial College)
DESCRIPTION;ENCODING=QUOTED-PRINTABLE: Colloquium title: Positivity in the sky=0D=0A=
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Abstract: I will discuss the subtle interplay between the understanding of the laws of Nature as we observe them or test them in our "everyday experiments", and their underlying embedding within an ultimate high energy completion. I will highlight how the notion of causality enables us to connect some of the laws of physics at low energy with their behaviour at much higher energy, and clarify how the notion of causality is manifested with gravity, a consideration which is particularly relevant for putting constraints on the physical theories we use to describe observations and make future predictions. By considering low-energy processes including effects from Standard Model particles, I will also argue how we can get an insight on some properties of physics at high energy, well beyond what is accessible with current and future observations and experiments.=0D=0A=
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The Colloquium will be followed by light refreshments in the Senior Common Room, on the first floor of the Queens' building, from 15:30.
LOCATION:Skeels Lecture Theatre 
DTSTART:20260603T140000
DTEND:20260603T153000
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