Citation

BibTex format

@article{Carrillo:2024:10.1007/JHEP06(2024)146,
author = {Carrillo, González M and de, Rham C and Jaitly, S and Pozsgay, V and Tokareva, A},
doi = {10.1007/JHEP06(2024)146},
journal = {Journal of High Energy Physics},
title = {Positivity-causality competition: a road to ultimate EFT consistency constraints},
url = {http://dx.doi.org/10.1007/JHEP06(2024)146},
volume = {2024},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Effective field theories (EFT) are strongly constrained by fundamental principles such as unitarity, locality, causality, and Lorentz invariance. In this paper, we consider the EFT of photons (or other U(1) gauge field) and compare different approaches to obtain bounds on its Wilson coefficients. We present an analytic derivation of the implications of unitarity (linear and non-linear positivity bounds) and compare these constraints with the requirement of causal propagation of the photon modes around non-trivial backgrounds generated by external sources. Within this setup, we find that the low energy causality condition can give complementary constraints to our analytic positivity bounds. In other words, simple analytic techniques can give strong constraints on the allowed region of the photon EFT parameters even when the positivity bounds are not numerically optimized.
AU  - Carrillo,González M
AU  - de,Rham C
AU  - Jaitly,S
AU  - Pozsgay,V
AU  - Tokareva,A
DO  - 10.1007/JHEP06(2024)146
PY  - 2024///
TI  - Positivity-causality competition: a road to ultimate EFT consistency constraints
T2  - Journal of High Energy Physics
UR  - http://dx.doi.org/10.1007/JHEP06(2024)146
VL  - 2024
ER  -
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