• Basis invariant measure of CP-violation and renormalization. 

      Hohenegger, Andreas; Kartavtsev, Alexander (Journal article; Peer reviewed, 2015-08)
      We analyze, in the context of a simple toy model, for which renormalization schemes the CP-properties of bare Lagrangian and its finite part coincide. We show that this is the case for the minimal subtraction and on-shell ...
    • Gauged Wess-Zumino terms for a general coset space 

      Brauner, Tomas; Kolesova, Helena (Peer reviewed; Journal article, 2019)
      The low-energy physics of systems with spontaneously broken continuous symmetry is dominated by the ensuing Nambu-Goldstone bosons. It has been known for half a century how to construct invariant Lagrangian densities for ...
    • On high-order perturbative calculations at finite density 

      Ghisoiu, Ioan; Gorda, Tyler; Kurkela, Aleksi; Romatschke, Paul; Säppi, Matias; Vuorinen, Aleksi (Journal article; Peer reviewed, 2017-02)
      We discuss the prospects of performing high-order perturbative calculations in systems characterized by a vanishing temperature but finite density. In particular, we show that the determination of generic Feynman integrals ...