Theorie-Palaver
May 23, 2023 at 2 p.m. in Lorentz room (Staudingerweg 7, 5th floor)Mathias Becker
Sebastian Schenk
Yong Xu
The Electroweak Symmetry Breaking Sector of the Standard Model is an active field where new physics is sought. In the absence of new higher-energy particles at colliders, Effective Field Theories in terms of the Standard Model particles (longitudinal gauge
and Higgs bosons) seem a natural tool. New physics could then manifest itself as new forces modifying the couplings of those particles.
Should such new forces be found, they could be used to confront (falsify?) the popular SMEFT: as it is not the most general possible EFT, we have managed to produce correlations among the parameters of the embedding HEFT that can be tested if that new physics is describable by SMEFT. We have also extended HEFT via the Inverse Amplitude Method to be able to address resonances in the electroweak sector directly from the low-energy particles and eventual BSM couplings, thus maintaining agnosticism about the nature of the eventual new physics,
and I will discuss the systematic uncertainties of the unitarization procedure.
Based on various works, e.g.
https://inspirehep.net/literature/2120028 https://inspirehep.net/literature/2154526
https://inspirehep.net/literature/1826204 https://inspirehep.net/literature/1345172
https://inspirehep.net/literature/1310013