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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8659
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dc.contributor.authorChakraborty, Amlan-
dc.contributor.authorDas, Anirban-
dc.contributor.authorDas, Subinoy-
dc.contributor.authorSethi, Shiv K.-
dc.date.accessioned2026-02-12T09:37:20Z-
dc.date.available2026-02-12T09:37:20Z-
dc.date.issued2025-03-05-
dc.identifier.citationPhysical Review D, 2025, Vol. 111(6), AR No. 63515en_US
dc.identifier.issn2470-0029-
dc.identifier.urihttp://hdl.handle.net/2289/8659-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractAs one of the fundamental unknowns of our Universe, the mass of dark matter remains to be a topic of great interest. We consider the possibility of a time-variation of the dark matter mass. We study the cosmological constraints on a model where the dark matter mass transitions from zero to a finite value in the early Universe. In this model, the matter power spectrum exhibits power suppression below a certain scale that depends on the epoch of transition, and the angular power spectrum of the cosmic microwave background shows a distinctive phase shift and power suppression at small scales. We use the latest cosmic microwave background data and the 𝑆8 priors from weak lensing data to place a lower limit on the transition redshift. We also find that the data from the Atacama Cosmology Telescope (ACT) show a mild preference for the mass-varying dark matter model over Λ Cold Dark Matter (Λ⁢CDM).en_US
dc.language.isoenen_US
dc.publisherPhysical Review Den_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2025PhRvD.111f3515C/abstracten_US
dc.relation.urihttps://doi.org/10.48550/arXiv.2405.08476en_US
dc.relation.urihttps://doi.org/10.1103/PhysRevD.111.063515?_gl=1*wq011v*_gcl_au*NDE5MDIzNDE4LjE3NjgzODAxNjE.*_ga*MjEyMjY0MTg5OS4xNzY4MzgwMTc1*_ga_ZS5V2B2DR1*czE3NjgzODAxNzQkbzEkZzEkdDE3NjgzODA1NTQkajYwJGwwJGg3ODc0ODM5NjI.en_US
dc.rights2025 American Physical Societyen_US
dc.subjectCosmologyen_US
dc.subjectDark matteren_US
dc.titleCosmological constraints on mass-varying dark matteren_US
dc.typeArticleen_US
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