22–26 Aug 2022
Rio de Janeiro
America/Sao_Paulo timezone

Inflation with two-form field: the production of primordial black holes and gravitational waves

22 Aug 2022, 14:40
20m
Rio de Janeiro

Rio de Janeiro

Vice-Governador Rúbens Berardo street, 100 - Gávea Rio de Janeiro - 22451-070
Plenary/Parallel talk Inflation and the primordial universe Parallel Session Lecture Room

Speaker

Dr Ippei Obata (Max-Planck-Institute for Astrophysics)

Description

Antisymmetric tensor field (two-form field) is a ubiquitous component in string theory and generally couples to the scalar sector through its kinetic term. In this paper, we propose a cosmological scenario that the particle production of two-form field, which is triggered by the background motion of the coupled inflaton field, occurs at the intermediate stage of inflation and generates the sizable amount of primordial black holes as dark matter after inflation. We also compute the secondary gravitational waves sourced by the curvature perturbation and show that the resultant power spectra are testable with the future space- based laser interferometers.

Primary author

Dr Ippei Obata (Max-Planck-Institute for Astrophysics)

Co-authors

Prof. Tomohiro Fujita (Waseda Institute for Advanced Study, Waseda University) Dr Hiromasa Nakatsuka (Institute for Cosmic Ray Research, The University of Tokyo) Sam Young (Instituut-Lorentz for Theoretical Physics, Leiden University)

Presentation materials

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