UFRGS-HEP Journal Club
Thursday 22 October 2020 -
15:30
Monday 19 October 2020
Tuesday 20 October 2020
Wednesday 21 October 2020
Thursday 22 October 2020
15:30
Lucas Lopes
Lucas Lopes
15:30 - 16:30
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