Year: 2024
Type: article
Abstract: A bstract By considering an arbitrary bare action describing BSM physics, we use the Barvinsky-Vilkovisky resummation to obtain the most general non-local electroweak effective action at second order in the field strength. We also include the contribution of the functional measure to the effective action, which is found to modify the Higgs potential by shifting its vacuum value. The resulting effective action provides one-loop corrections to the W and Z boson masses, ultimately leading to the most general expression for the ρ parameter at one-loop. The functional measure plays a pivotal role as it allows the parameterization of ρ in inverse powers of the scale of new physics, while containing non-local form factors. The comparison of ρ with the latest data leads to several constraints on the UV particle spectra of BSM models.
Source: Journal of High Energy Physics
Authors: Iberê Kuntz, Amanda Malagi
Institution: Universidade Federal do Paraná
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G3886637596, G4822133826
OpenAlex ID: W4405982508