7 papers
Schwinger-Keldysh Path Integral for Gauge theories
Greg Kaplanek, Maria Mylova, Andrew J. Tolley
We develop the Schwinger-Keldysh path-integral formalism for open non-Abelian gauge theories that are gauge-fixed via the BRST method in covariant gauges. We focus on generic initi…
Gauging Open EFTs from the top down
Greg Kaplanek, Maria Mylova, Andrew J. Tolley
We present explicit top-down calculations of Open EFTs for gauged degrees of freedom with a focus on the effects of gauge fixing. Starting from the in-in contour with two copies of…
The Serendipitous Axiodilaton: A Self-Consistent Recombination-Era Solution to the Hubble Tension
Adam Smith, Maria Mylova, Carsten van de Bruck +2
Axio-dilaton cosmology provides a minimal benchmark model for both Dark Matter (DM) and Dark Energy (DE) that is well motivated by fundamental physics. The axion and dilaton arise…
Extending Weinberg's EFT: effective scalar-tensor theories up to sixth order
Eugeny Babichev, SukÅti Bansal, Sukŗti Bansal +2
We present a systematic construction of the six-derivative effective scalar-tensor theories, extending the four-derivative framework previously developed by Steven Weinberg. The on…
A Minimal Axio-dilaton Dark Sector
Adam Smith, Maria Mylova, Philippe Brax +3
In scalar-tensor theories it is the two-derivative sigma-model interactions that like to compete at low energies with the two-derivative interactions of General Relativity (GR) $\u…
New shape for cross-bispectra in Chern-Simons gravity
Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin +2
Chern-Simons gravity is known to suffer from graviton ghost production during inflation, which suppresses the parity-violating power spectrum at scales relevant to cosmic microwave…