Inflation, SUSY breaking, and primordial black holes in modified supergravity coupled to chiral matter
Aldabergenov Y. Addazi A. Ketov S.V.
August 2022Springer Nature
European Physical Journal C
2022#82Issue 8
We propose a novel model of the modified (Starobinsky-like) old-minimal-type supergravity coupled to a chiral matter superfield, that can simultaneously describe multi-field inflation, primordial black hole (PBH) formation, dark matter (DM), and spontaneous supersymmetry (SUSY) breaking after inflation in a Minkowski vacuum. The PBH masses in our supergravity model of double slow-roll inflation, with a short phase of “ultra-slow-roll” between two slow-roll phases, are close to 10 18 g. We find that a significant PBH fraction in the allowed mass window can be supplemented by spontaneous SUSY breaking in the vacuum with the gravitino mass close to the scalaron (inflaton) mass M of the order 10 13 GeV. Our supergravity model favors the composite nature of DM as a mixture of PBH and heavy gravitinos as the lightest SUSY particles. The composite DM significantly relaxes fine-tuning needed for the whole PBH-DM. The PBH-DM fraction is derived, and the second-order gravitational wave background induced by the enhanced scalar perturbations is calculated. Those gravitational waves may be accessible by the future space-based gravitational interferometers.
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Department of Physics, Faculty of Science, Chulalongkorn University, Thanon Phayathai, Bangkok, Pathumwan, 10330, Thailand
Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty, 050040, Kazakhstan
Center for Theoretical Physics, College of Physics, Science and Technology, Sichuan University, Chengdu, 610065, China
Laboratori Nazionali di Frascati (INFN), Via Enrico Fermi 54, Frascati Rome, 00044, Italy
Department of Physics, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Tokyo, Hachioji-shi, 192-0397, Japan
Research School of High-Energy Physics, Tomsk Polytechnic University, 2a Lenin Avenue, Tomsk, 634028, Russian Federation
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, Kashiwa, 277-8583, Japan
Department of Physics
Department of Theoretical and Nuclear Physics
Center for Theoretical Physics
Laboratori Nazionali di Frascati (INFN)
Department of Physics
Research School of High-Energy Physics
Kavli Institute for the Physics and Mathematics of the Universe (WPI)
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