Dark Matter Freeze-in During Warm Inflation

  • Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars

October 22, 2024 2:00 PM - October 22, 2024 3:00 PM
PAIS 3205

Host:
Rouzbeh Allahverdi
Presenter:
Dr. Barmak Shams Es Haghi (UT Austin)
In this talk, I will present a novel perspective on the role of inflation in the production of Dark Matter (DM). Specifically, I will explore the DM production during Warm Inflation via ultraviolet Freeze-In (WIFI). After a brief review of DM production from a thermal bath, I will discuss the possibility of having a radiation bath during the inflationary phase; the so-called Warm Inflation (WI). Then I will demonstrate that in a WI setting the persistent thermal bath, sustained by the dissipative interactions with the inflaton field, can source a sizable DM abundance via the non-renormalizable interactions that connect the DM with the bath. Compared to the (conventional) radiation-dominated UV freeze-in scenario for the same reheating temperature, the resulting DM yield in WIFI is always enhanced, showing a strongly positive dependence on the mass dimension of the non-renormalizable operator. As I will show,  for a sufficiently large mass dimension of the operator, the entirety of the DM abundance of the Universe can be created during the inflationary phase.

Upcoming Events

Search for Neutrinoless Double Beta Decay with LEGEND Using Simulation and Machine Learning
Zafer Acar (UNM)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
May. 5, 2:00 PM
PAIS 3205

TBD
Sam Halverson (JPL)
CART Astrophysics Seminar Series
May. 7, 2:00 PM - May. 7, 3:00 PM
PAIS 3205

Title TBD
Presenter TBD
Physics and Astronomy Colloquium
May. 8, 3:30 PM - May. 8, 4:30 PM
PAIS 1100

Finals Week -- No Colloquium

Physics and Astronomy Colloquium
May. 15, 3:30 PM - May. 15, 4:30 PM
PAIS 1100

Department Convocation
Kathrin Spendier, PhD
Special Talk
May. 16, 12:00 PM - May. 16, 2:00 PM
PAIS 1100 and Lobby