Scale dependent galaxy clustering bias from transient reductions of the inflaton's speed of sound
Fecha
2021Autor
Achúcarro, Ana
Patil, Subodh
LEIDEN UNIVERSITY
Institución
Resumen
The formation of large scale structure e.g. clusters of galaxies has caught
plenty of attention lately, since nowadays there exists the technology to
collect data with high precision. This implies that we might be able to start
probing theories that go beyond the simplest single-field inflationary scenario,
as an effective single-field theory coming from a two-field inflation
framework. In particular, in this work, we study the (scale-dependent)
bias in galaxy clustering that comes from an effective field theory, whose
effect in the inflaton dynamics is a transient reduction in the speed of
sound.