SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 83: Theory BSM
T 83.4: Vortrag
Mittwoch, 22. März 2023, 18:15–18:30, HSZ/0201
Holographic Non-Abelian Flavour Symmetry Breaking — •Yang Liu1, Werner Porod1, Johanna Erdmenger1, and Nicholas Evans2 — 1Universität Würzburg — 2University of Southampton
Multiple AdS/QCD models have been constructed to explain the lowest QCD meson and baryon spectra. Albeit the action is formulated in a non-abelian way, the spectra are essentially abelian. To produce the non-abelian spectra as observed in QCD, our work starts with the non-abelian DBI action taken from a top-down model in string theory. In constructing a bottom-up version, we keep the spirit of the top-down model, i.e. extending the action to matrices in flavour space, which describes coincident Nf D-branes. The explicitly breaking of the flavour symmetry is realised by separating the branes. The fact that the metric and coupling constants are matrices in the flavour space marks the main difference from the other models. We computed the two- and three-flavour QCD spectra and show the validity of our model.