Speaker
Carlo Tasillo
(DESY Hamburg)
Description
Last year pulsar timing arrays unveiled the first detection of a stochastic gravitational wave background at nano-Hertz frequencies. The background could potentially arise from a population of merging supermassive black holes or – arguably even more exciting – an event in the early cosmos. In this talk, I will discuss the possibility that the recently measured signal stems from a phase transition that happened within the first second after the Big Bang. The specific focus of the talk will be under which conditions phase transitions in a dark sector can serve as an explanation compatible with constraints from precision cosmology. I will conclude with a comment on the question of the likelihood of a new physics explanation.
| Title of the Poster/Talk | Exploring cosmological phase transitions with pulsar timing arrays |
|---|---|
| Related Papers/Preprints | Main focus of talk is on https://inspirehep.net/literature/2669369. Some comments on https://inspirehep.net/literature/2673485 will be made. |
Primary author
Carlo Tasillo
(DESY Hamburg)
Co-authors
Dr
Kai Schmidt-Hoberg
(DESY)
Paul Frederik Depta
(Max-Planck-Institut für Kernphysik)
Dr
Thomas Konstandin
(DESY)
Torsten Bringmann
(University of Oslo)
