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2021 Fall KIAS HEP Seminar Series

New Positivity Bounds on Effective Field Theories

by Dr Tevong You (University of Cambridge & CERN)


Title: New Positivity Bounds on Effective Field Theories

Speaker: Dr Tevong You (University of Cambridge & CERN)

Abstract: Effective field theory (EFT) is a powerful framework and organising principle for characterising phenomena at different energy scales.  The effects of heavier ultra-violet (UV) degrees of freedom become encapsulated in the Wilson coefficients of higher-dimensional operators at low energies in the infra-red (IR).  Positivity bounds place general constraints on these coefficients using only fundamental properties of the UV theory such as locality, unitarity, and causality.  I will review the derivation of these positivity bounds before presenting recent work extending their applicability to the case of EFTs involving massive spinning particles.

[Seminar] Tevong You
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KIAS HEP-PH Organizer
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