UFRGS-HEP Journal Club

Thursday 22 Oct 2020, 15:30 → 16:30 America/Sao_Paulo

IF-UFRGS

Gustavo Gil Da Silveira (Universidade do Estado do Rio de Janeiro (BR))

15:30 → 16:30 Lucas Lopes

Heavy Light Inflaton and Dark Matter Production
Fedor Bezrukov, Abigail Keats
Phys.Rev.D102:115011,2020

Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2010.06358v1

We study the minimal extension of the SM by a scalar with quartic interaction serving as an inflaton. For the model where scale symmetry is broken only in the inflaton sector, the mass of the inflaton is constrained to be relatively low. Here, we analysed the previously omitted situation of the inflaton masses mχ≳250 GeV. Therefore, we provide a window of inflaton masses with viable inflationary properties that evade direct observational constraints, due to their small mixing with the Higgs sector. The addition of heavy neutral leptons with Majorana masses induced by the interaction with the inflaton allow for Cold Dark Matter in the model with masses O(1−10) MeV.
Authors' comments: 9 pages, 4 figures