TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.16.2.045
TI  - Apparent fine tunings for field theories with broken space-time symmetries
PY  - 2024/02/09
UR  - https://scipost.org/SciPostPhys.16.2.045
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 16
IS  - 2
SP  - 045
A1  - Nicolis, Alberto
AU  - Rothstein, Ira Z.
AB  - 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.
ER  -

@Article{10.21468/SciPostPhys.16.2.045,
	title={{Apparent fine tunings for field theories with broken space-time symmetries}},
	author={Alberto Nicolis and Ira Z. Rothstein},
	journal={SciPost Phys.},
	volume={16},
	pages={045},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.16.2.045},
	url={https://scipost.org/10.21468/SciPostPhys.16.2.045},
}