Scalar multiplet dark matter in a fast expanding Universe: Resurrection of the desert region

Author(s)

Barman, Basabendu ^[1] ; Ghosh, Purusottam ^[2] ; Queiroz, Farinaldo S. ^{[3, 4]} ; Saha, Abhijit Kumar ^[5]

Affiliation

^[1] IIT Guwahati, Dept Phys, Gauhati 781039 - India

^[2] HBNI, Harish Chandra Res Inst, Reg Ctr Accelerator Based Particle Phys, Chhatnag Rd, Allahabad 211019, Uttar Pradesh - India

^[3] Univ Fed Rio Grande do Norte, Dept Fis, BR-59078970 Natal, RN - Brazil

^[4] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, Natal, RN - Brazil

^[5] Indian Assoc Cultivat Sci, Sch Phys Sci, 2A & 25 Raja SC Mullick Rd, Kolkata 700032 - India

• Document type: Journal article
• Source: Physical Review D; v. 104, n. 1 JUL 30 2021.
• Web of Science Citations: 1

Abstract

We examine the impact of a faster expanding Universe on the phenomenology of scalar dark matter (DM) associated with SU(2)(L) multiplets. Earlier works with a radiation dominated Universe have reported the presence of desert region for both inert SU(2)(L) doublet and triplet DM candidates where the DM is underabundant. We find that the existence of a faster expanding component before big bang nucleosynthesis can revive a substantial part of the desert parameter space consistent with relic density requirements and other direct and indirect search bounds. We also review the possible collider search prospects of the newly obtained parameter space and predict that such region might be probed at the future colliders with improved sensitivity via a disappearing/stable charged track. (AU)

• FAPESP's process: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
• Grantee: Nathan Jacob Berkovits
• Support Opportunities: Special Projects
• FAPESP's process: 15/15897-1 - Cherenkov Telescope Array - CTA
• Grantee: Luiz Vitor de Souza Filho
• Support Opportunities: Research Projects - Thematic Grants