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SUMMARY:#StudentSeminar: Early-Universe constraints on the electron mass a
 nd other observables
DTSTART;VALUE=DATE-TIME:20261006T130000Z
DTEND;VALUE=DATE-TIME:20261006T143000Z
DTSTAMP;VALUE=DATE-TIME:20260929T170604Z
UID:indico-event-8788@indico.ific.uv.es
DESCRIPTION:Fundamental constants are a crucial ingredient in our understa
 nding of particles and fields. Our knowledge comes mostly from observation
 s performed at terrestrial experiments nowadays\, but this cannot provide 
 us any probe about their value throughout the Universe's history. For this
  reason\, it is interesting to investigate whether the fundamental paramet
 ers of the Standard Model have always had the same values throughout cosmi
 c history.\n\nThe aim of this work is to evaluate the effect of a non-stan
 dard electron mass in the early Universe picture\, in particular consideri
 ng the neutrino decoupling scenario and Big Bang Nucleosynthesis (BBN). By
  comparing the light element abundances predicted by BBN with their observ
 ed values and applying constraints on the effective number of relativistic
  species N_eff \, we derive the earliest bound on the value of the electro
 n mass in the early universe\, which is remarkably similar to the one meas
 ured at terrestrial experiments nowadays. This confirms that the value of 
 the electron mass has been constant throughout most of the life of the Uni
 verse.\n\nWe will see how this analysis can be extended to other fundament
 al parameters relevant to the early Universe\, and what we can learn from 
 studying their possible variation over cosmic history.\n\nhttps://indico.i
 fic.uv.es/event/8788/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/8788/
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