11 papers
Axion Inflation: Perturbative control in the strong backreaction regime
Valerie Domcke, Alexandros Papageorgiou, Marco Peloso +1
We study the strong backreaction regime in axion inflation, in which the friction from Abelian gauge fields generated via the pseudo-scalar interaction $\fracβ{4 M_p} ÏF {\tilde…
Primordial black hole dark matter from axion inflation
Gabriele Franciolini, Nadir Ijaz, Marco Peloso
We revisit the production of primordial black holes (PBHs) by a U(1) gauge field with a pseudo-scalar coupling to the inflaton. We improve upon the existing literature by working i…
Revisiting the Chern-Simons interaction during inflation with a non-canonical pseudo-scalar
Jun'ya Kume, Marco Peloso, Nicola Bartolo
A Chern-Simons interaction between a pseudo-scalar field and a U(1) gauge field results in the generation of a chiral gravitational wave background. The detection of this signal is…
Challenges and Opportunities of Gravitational Wave Searches above 10 kHz
Nancy Aggarwal, Odylio D. Aguiar, Diego Blas +34
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges…
Axion inflation in the regime of homogeneous backreaction
Matteo Barbon, Nadir Ijaz, Marco Peloso
We investigate the Stochastic Gravitational Wave Background (SGWB) produced in models of axion inflation coupled to gauge fields. Achieving a detectable signal at Pulsar Timing Arr…
Strong scale-dependence does not enhance the kinematic boosting of gravitational wave backgrounds
Giorgio Mentasti, Carlo R. Contaldi, Marco Peloso
Existing expressions in the literature appear to indicate that Doppler boosting, due to our proper motion with respect to the isotropic frame of the universe, can amplify stochasti…