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UID:f77ad973-c0b8-4d6f-8d59-e540474b70aa@nexttoyou
DTSTAMP:20261105T151607Z
DTSTART:20261105T203000Z
DTEND:20261105T213000Z
SUMMARY:Special Seminar: The Fading Dark Sector In Light of DESI
LOCATION:207 Phillips Hall
DESCRIPTION:Speaker: David Wu\, Graduate Student\, Harvard University\n\nT
 itle: The Fading Dark Sector In Light of DESI\n\nAbstract: In this talk\,
  I will present a string-inspired cosmological model with a coupled dark 
 sector that evolves with a scalar field\, which we refer to as the fading
  dark sector (FDS). The model provides an excellent fit to DESI DR2 baryo
 n acoustic oscillation measurements and cosmic microwave background obser
 vations from Planck and ACT\, while remaining remarkably consistent acros
 s different supernova datasets. Across these dataset combinations\, the F
 DS is statistically comparable to the CPL parameterization in outperformi
 ng LCDM\, while providing a physical explanation for the apparent phantom
  behavior without violating the null energy condition. I will then discus
 s recent progress on the full-shape analysis of the FDS using the DESI DR
 1 galaxy power spectrum in combination with techniques from the effective
  field theory of large-scale structure. This provides a complementary pro
 be of dark sector interactions and an opportunity to further distinguish 
 the FDS from phenomenological models of evolving dark energy.\n\nhttp://n
 ext-to-u.app/events/f77ad973-c0b8-4d6f-8d59-e540474b70aa
URL:http://next-to-u.app/events/f77ad973-c0b8-4d6f-8d59-e540474b70aa
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