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Joint INFN-UNIMI-UNIMIB Pheno Seminars
Microscopic Bounds on Macroscopic Theories
by ,
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Europe/Zurich
https://fisica-unimi.zoom.us/j/92356692997?pwd=UDhibDh6eTkyN3g3SEdWZEFuUjhWQT09
https://fisica-unimi.zoom.us/j/92356692997?pwd=UDhibDh6eTkyN3g3SEdWZEFuUjhWQT09
Description
Effective Field Theories (EFTs) appear everywhere there is a mass scale. They serve to simplify complex multiscale problems (e.g. the theory of fermions below the electroweak scale), and they serve as general tools to parametrise the unknown or incalculable (e.g. the pion chiral Lagrangian, gravity, or physics beyond the standard model - BSM). I will present a tool to single out EFTs that can originate from microscopic unitary theories, and show that massive gravity, theories with isolated massive higher-spin particles, and theories with very irrelevant interactions, are not of this kind. This reshapes the landscape of plausible physics BSM, and focusses new physics searches at particle colliders.
