Speaker
Dr
Amitayus Banik
(Chungbuk National University)
Description
We study gravitational wave (GW) signatures from dark sector phase transitions as an explanation of the stochastic GW signal in the nHz range reported by the NANOGrav, Parkes and European Pulsar Timing Array (PTA) experiments. In contrast to earlier works, which have focused on fitting the PTA results with phenomenological phase transition parameters, we perform a detailed analysis of the GW spectrum beginning from underlying dark sector models at the microscopic level. We find viable models that can fit the PTA results, while consistent with other cosmological constraints.
Authors
Dr
Amitayus Banik
(Chungbuk National University)
Prof.
Yanou Cui
(University of California, Riverside)
Yu-Dai Tsai
(University of California, Irvine)
Yuhsin Tsai
(University of Notre Dame)
