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GAPP: A New Gravitational Action for the Trace Anomaly
Add to Calendar 2023-04-21T15:00:00 2023-04-21T16:00:00 UTC GAPP: A New Gravitational Action for the Trace Anomaly Zoom:
Start DateFri, Apr 21, 2023
11:00 AM
End DateFri, Apr 21, 2023
12:00 PM
Presented By
Gregory Gabadadze, New York University
Event Series: GAPP Seminar

General Relativity (GR) combined with the existing action for the trace anomaly is an inconsistent low energy effective field theory. 

This issue is addressed by extending GR into a certain scalar-tensor theory, which preserves the GR trace anomaly equation, up to 

higher order corrections. The extension introduces a new mass scale -- assumed to be below the Planck scale -- that governs four 

high dimensional terms in a local diff-invariant trace anomaly action. Such terms can be kept, while an infinite number of Planck-suppressed 

invariants are neglected. The resulting theory maintains two derivative equations of motion. In a certain approximation it reduces to the 

conformal Galileon, which could have physical consequences.