5 papers
A critical look at low-scale cosmological phase transitions in the PTA era
Simone Biondini, Philipp Schicho
Motivated by the recent evidence for a stochastic gravitational-wave (GW) background reported by pulsar timing array (PTA) collaborations, we perform a precision study of low-scale…
Charting the Flavour Structure of Dark Matter
Simone Biondini, Admir Greljo, Xavier Ponce DÃaz +1
What flavour structure of -channel thermal dark matter remains compatible with current flavour physics and direct detection bounds? We broadly chart the space of hypotheses usin…
Computing singlet scalar freeze-out with plasmon and plasmino states
S. Biondini, M. Eriksson, M. Laine
The final-state particles from cosmological dark matter co-annihilation are expected to equilibrate. As dictated by Hard Thermal Loop resummation, the spectrum of equilibrated quas…
Connecting -channel Dark Matter Models to the Standard Model Effective Field Theory
Simone Biondini, Lorenzo Tiberi, Orlando Panella
We investigate the connection between simplified dark matter models featuring a -channel scalar mediator and the Standard Model Effective Field Theory (SMEFT). We focus on scena…
Effective field theories for dark matter pairs in the early universe: Debye mass effects
Simone Biondini, Nora Brambilla, Andrii Dashko +2
In some scenarios for the early universe, non-relativistic thermal dark matter chemically decouples from the thermal environment once the temperature drops well below the dark matt…