The EFT Bootstrap at Finite $M_{PL}$

Abstract

We explore the impact of loop effects on positivity in effective field theories emerging in the infrared from unitary and causal microscopic dynamics. Focusing on massless particles coupled to gravity, we address the treatment of forward-limit divergences from loop discontinuities and establish necessary conditions for maintaining computational control in perturbation theory. While loop effects remain small, ensuring consistency in our approach leads to a significant impact on bounds, even at tree level.

38 pages, 4 appendices, 15 figures

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Cited by in corpus (5)

• Non-Forward UV/IR Relations
• Strings from Almost Nothing
• Positivity bounds in scalar-QED EFT at one-loop level
• Primal S-matrix bootstrap with dispersion relations
• The Rise of Linear Trajectories