"Cosmological constraints on Dark Matter properties," by Tommi Tenkanen (University of Helsinki)

Thursday, December 3, 2015 - 10:00am to 11:00am
TEP Seminars

TEP Seminar

Physics & Astronomy Building (PAB) Room 4-708
Thursday, December 3, 2015

Guest Speaker: Tommi Tenkanen (University of Helsinki)

Talk Title: "Cosmological constraints on Dark Matter properties"


We show that dark matter abundance and inflationary scale could be intimately related. Standard Model extensions with Higgs mediated couplings to new physics typically contain extra scalars whose excursions at the end of inflation can be very large. If their coupling to the Standard Model is weak, they will not thermalize and may easily constitute too much dark matter. As an example we consider Standard Model extended by a real singlet scalar and a singlet fermion. We discuss the field dynamics during inflation together with the post-inflationary dark matter production mechanisms and derive stringent constraints on viable mass scales and coupling values.

Event Attachments: 
PAB 4-708