Work

The EFT bootstrap at finite MPL

Year: 2025

Type: article

Abstract: A bstract 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.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep06(2025)209

Authors: Carl Beadle, Giulia Isabella, Davide Perrone, Sara Ricossa, Francesco Riva, Francesco Serra

Institutions: University of Geneva, University of California, Los Angeles, Johns Hopkins University, Scuola Normale Superiore

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, U.S. Department of Energy, Alfred P. Sloan Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung