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SUMMARY:Cosmic tensions as a window into the dark sector - Elsa Teixeira (
 Montpellier U.)
DTSTART:20260209T130000Z
DTEND:20260209T140000Z
UID:TALK242620@talks.cam.ac.uk
CONTACT:Gonzalo Villa
DESCRIPTION:The standard Lambda Cold Dark Matter (ΛCDM) cosmological mode
 l has proven remarkably successful in describing a broad range of observat
 ional data\, ranging from the CMB to the large-scale structure of the Univ
 erse. However\, recent advances in precision cosmology have revealed persi
 stent discrepancies between independent data sets and observational method
 s. The most prominent of these is the Hubble tension\, reflecting the di
 sagreement between early- and late-Universe determinations of the Hubble c
 onstant. In parallel\, recent analyses by the DESI collaboration\, combin
 ing multiple data sets\, have reported evidence for dynamical dark energy 
 in the form of an effective phantom fluid. While such behaviour is diffic
 ult to accommodate within minimally coupled dark energy models\, it can n
 aturally arise as an effective description of interactions in the dark sec
 tor. In this talk\, I review the current status of these cosmic tensions 
 and discuss how they may be interpreted as signals of late-time dark secto
 r physics. Focusing on the Dark D-Brane model\, in which dark matter and 
 dark energy interact and share a common origin\, I will show how dark sect
 or physics can alleviate the cosmic tensions while remaining consistent wi
 th current observational constraints.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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