2022/11/29 by Nabarun Chakrabarty, Chakrabarty, Nabarun
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2211.16559
openalex publication_date 2022/11/29 · openalex created_date 2022/12/12 · openalex updated_date 2026/07/28
While an additional scalar multiplet over and above the Standard Model can lead to a strong electroweak phase transition, depending on its quantum numbers, it also potentially confronts crucial constraints from theory and experiments. Should there exist more than one copy of such a multiplet, it is possible to predict that number from the requirements of a strong electroweak phase transition and agreement with the latest constraints. We aim to probe this specific issue in this study in the context of N degenerate scalar triplets governed by a global O(N) symmetry. We fold in important constraints from h → γγ signal strength, dark matter direct detection and Landau pole behaviour. A combined analysis reveals N \gtrsim 70 for a strong phase transition and consistency with the constraints. We also look into possible gravitational wave signals in the parameter regions of interest.