Speaker
Description
We present a self-consistent, manifestly Lorentz-invariant computation of real-time quark and meson spectral functions in the two-flavour Quark-Meson model, performed directly on the Minkowski axis using the spectral functional renormalisation group with emergent composites. The present work hosts two qualitative improvements over other spectral functional works so far. The first one is the inclusion of all-order scatterings via a full effective potential. The second one is the resolution of higher order decays and, in particular, the $\pi \to 3\pi$ scattering threshold - the lowest kinematically accessible channel for the pion. Moreover, the sigma mode exhibits a Breit-Wigner resonance reflecting its instability against decay into two pions.
| Affiliation | Institut für Theoretische Physik, Universität Heidelberg |
|---|---|
| Career status | PhD student |