Cosmological phase transitions, gravitational waves and self-interacting dark matter in the singlet extension of MSSM

• Published in: The European physical journal. C, Particles and fields Vol. 82; no. 12; pp. 1120 - 10
• Main Authors: Wang, Wenyu, Xie, Ke-Pan, Xu, Wu-Long, Yang, Jin Min
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2022; Springer; Springer Nature B.V; SpringerOpen
• Subjects: Analysis; Anomalies; Astronomical models; Astronomy; Astrophysics and Cosmology; Cosmology; Dark matter; Dark matter (Astronomy); Elementary Particles; Gravitational waves; Hadrons; Heavy Ions; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Parameters; Particle physics; Phase transitions; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; Standard model (particle physics); String Theory; Supersymmetry; Symmetry; Theoretical physics
• ISSN: 1434-6052; 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-022-11077-3

In the minimal supersymmetric standard model (MSSM) extended by a singlet superfield, when the coupling between the singlet sector and the MSSM sector is tiny, the singlet sector can be a quasi dark sector with supersymmetry (SUSY). We investigate the cosmological phenomena in this scenario and obtain the following observations: (i) In the parameter space solving the small cosmological scale anomalies via self-interacting singlino dark matter (SIDM), a first-order phase transition (FOPT) can readily happen but requires rather light dark matter below MeV; (ii) The corresponding parameter space indicated by FOPT and SIDM can be partially covered by detecting the phase-transition gravitational waves (GWs) at the near-future projects, such as LISA, TianQin and Taiji. Therefore, the recently developed GW astronomy could be a novel probe to such a SUSY scenario.