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SUMMARY:Baryon inhomogeneities from the electroweak scale to BBN\, CMB and
  today
DTSTART:20260603T123000Z
DTEND:20260603T143000Z
DTSTAMP:20260527T212100Z
UID:indico-event-1836@indico.dfa.unipd.it
CONTACT:edoardo.vitagliano@unipd.it
DESCRIPTION:Speakers: Stefan Stelzl (IFAE)\n\nIn this talk I present the i
 mplications of precision measurements of light element abundances in conco
 rdance with the Cosmic Microwave Background for scenarios of physics beyon
 d the Standard Model that generate large inhomogeneities in the baryon-to-
 photon ratio. We show that precision Big Bang Nucleosynthesis (BBN) impose
 s strong constraints on any mechanism that produces large scale inhomogene
 ities at temperatures of the order or below a TeV. In particular\, we find
  that inhomogeneities of the order of at comoving length scales larger tha
 n the comoving horizon at the temperature of are in conflict with the meas
 ured light element abundances. Furthermore\, I show the evolution of baryo
 n inhomogeneities from BBN\, to CMB\, to today. In particular\, I will hig
 hlight that the observed uniformity of D/H measurements yields the stronge
 st constraints on comoving scales larger than around 20 kpc. Finally I bri
 efly highlight the phenomenological consequences of these probes on models
  beyond the SM. \n\nhttps://indico.dfa.unipd.it/event/1836/
LOCATION:1/1-2 - Aula "C. Voci" (Dipartimento di Fisica e Astronomia - Edi
 ficio Marzolo)
URL:https://indico.dfa.unipd.it/event/1836/
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