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Quantum Gravity and All of That
June 29, 2023 18:00, Moscow, online
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Causality and Scattering Time delays
Andrew Tolley Imperial College London
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Abstract:
Since the 1950’s it has been understood that causality imposes restrictions on the time delays incurred in scattering events, and this in turn places useful constraints on the S-matrix. I will review the classic and modern incarnations of this idea, including its realization in spherically symmetric and pp-wave spacetimes, and how it can be used to put constraints on effective field theories in a complementary way to positivity bounds.
Language: English
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