Jasper Roosmale Nepveu, Five-loop spectra of general scalar EFTs and CFTs

Thursday 23 Oct 2025, 13:30 → 14:30 Europe/Stockholm

Å92110 (Ångströmslaboratoriet)

Renormalization is an essential aspect of both effective field theory (EFT) and conformal field theory (CFT). In EFT, the anomalous dimensions determine the parameters’ dependence on the energy scale of the process. At the conformal fixed point, the same quantities become directly observable as they determine the spectrum of the theory. I will present the perturbative renormalization of general scalar theories with arbitrary index structure in 4-ε spacetime dimensions. Our results are of direct relevance for real-world critical phenomena in three dimensions (ε=1), and they are in good agreement with non-perturbative data. Moreover, our insight on the spectrum of more complicated theories paves the way for future non-perturbative studies.

 

Based on 2507.12518 and ongoing work.