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SUMMARY:New Physics from the “Hubble Tension”
DTSTART:20260521T060000Z
DTEND:20260521T070000Z
DTSTAMP:20260519T032900Z
UID:indico-event-18025@indico.global
DESCRIPTION:Speakers: Vivian Poulin (LUPM\, CNRS & U. de Montpellier\, Fra
 nce)\n\nOver the last decade\, measurements of the expansion rate of the u
 niverse today\, H0\, made with cepheid-calibrated SN1a have become increa
 singly discrepant with the value predicted from the ΛCDM model when fit t
 o CMB data. After a brief review of the experimental situation\, I will sh
 ow the potential implications of this “Hubble tension” for new physics
 . I will argue that it points to some new mechanism at play in the pre- re
 combination universe (i.e.\, redshift z > 1000)\, rather than a new dynam
 ical effect at late-time (i.e. 0 < z < 1). I will discuss success and li
 mitations of a representative sample of proposed solutions\, and some mode
 l-independent implications of the Hubble tension that can help shed light 
 on its origin.\n\nhttps://indico.global/event/18025/
URL:https://indico.global/event/18025/
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