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SUMMARY:Geometric Constraints on the Pre-Recombination Expansion History f
 rom the Hubble Tension
DTSTART;VALUE=DATE-TIME:20260916T074000Z
DTEND;VALUE=DATE-TIME:20260916T080500Z
DTSTAMP;VALUE=DATE-TIME:20261023T231404Z
UID:indico-contribution-31288@indico.ific.uv.es
DESCRIPTION:Speakers: Davide Pedrotti (TIFPA-INFN\, Università di Trento)
 \nI perform a model-independent reconstruction of the background pre-recom
 bination expansion history of the Universe. I find that purely early-time 
 resolutions to the Hubble tension\, satisfying the geometric CMB constrain
 ts\, exist at the background level. This class of solutions requires a smo
 oth transition around matter-radiation equality\, characterized by a ≃15
 % expansion rate enhancement prior to recombination. This result serves as
  a blueprint for future model-building approaches\, providing a background
  stress-test for Hubble tension proposals.\n\nhttps://indico.ific.uv.es/ev
 ent/8160/contributions/31288/
LOCATION:
URL:https://indico.ific.uv.es/event/8160/contributions/31288/
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