Inflation with two-form field: the production of primordial black holes and gravitational waves. Issue 9 (1st September 2022)

• Record Type: Journal Article
• Authors: Fujita, Tomohiro; Nakatsuka, Hiromasa; Obata, Ippei; Young, Sam
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 9(2022)
• Publication Date: 2022-09-01
• Subjects: inflation -- dark matter theory -- gravitational waves / theory -- primordial black holes; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/09/017
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: 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.