SciPost Submission Page
Apparent Fine Tunings for Field Theories with Broken Space-Time Symmetries
by Alberto Nicolis, Ira Z. Rothstein
This Submission thread is now published as
Submission summary
| Submission information |
| Preprint Link: |
scipost_202401_00007v1
(pdf)
|
| Date accepted: |
2024-01-31 |
| Date submitted: |
2024-01-09 18:43 |
| Submitted by: |
Rothstein, Ira |
| Submitted to: |
SciPost Physics |
| Ontological classification |
| Academic field: |
Physics |
| Specialties: |
- High-Energy Physics - Theory
|
| Approach: |
Theoretical |
Abstract
We exhibit a class of effective field theories that have hierarchically small Wilson coefficients for operators that are not protected by symmetries but are not finely tuned. These theories possess bounded target spaces and vacua that break space-time symmetries. We give a physical interpretation of these theories as generalized solids with open boundary conditions. We show that these theories realize unusual RG flows where higher dimensional (seemingly irrelevant) operators become relevant even at weak coupling. Finally, we present an example of a field theory whose vacuum energy relaxes to a hierarchically small value compared to the UV cut-off.
