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LEPP Theory Seminar: Ira Rothstein (CMU)

Wednesday, October 20, 2021 at 2:00pm

Physical Sciences Building, 401
245 East Avenue

 A Generic Class of Field Theories  Which {\it Appear} to be Finely Tuned

Abstract: The Wilsonian paradigm asserts that hierarchies imply the existence of new UV physics to maintain naturalness. However, we know that this strong imperative can be avoided by allowing for the ground state to evolve, as in Abbotts' proposal to solve the cosmological constant problem.

Recently there have been similar proposals to solve the electro-weak hierarchy problem via a relaxation mechanism,  which however depend upon specific cosmological evolution including a ``trigger mechanism” which halts the evolution.  In this talk I will show that there is a class of effective field theories which have hidden relaxation mechanisms, and  avoid the need for any  cosmological model building, when the target space is compact. 

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Katerina Malysheva


Ira Rothstein

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