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

Finessing cold planets from TESS: Microlensing and Transiting methods
CART Astrophysics Seminar Series
Nov. 21, 2:00 PM
PAIS 3205

Uncovering the Smallest with the Biggest: Neutrinos & Cosmology
Physics and Astronomy Colloquium
Nov. 22, 3:30 PM - Nov. 22, 4:30 PM
PAIS 1100

NUPAC TBA
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Nov. 26, 2:00 PM - Nov. 26, 3:00 PM
PAIS 3205

Colloquium TBA
Physics and Astronomy Colloquium
Dec. 6, 3:30 PM
PAIS 1100